Saujanya Exports

Applications of Solvent Dyes

Applications of Solvent Dyes

Solvent dyes are one of the many types of colourants used worldwide to impart colour onto materials and objects. This type of dye is called solvent dye as it has the property of being soluble in organic solvents. On the other hand, it is insoluble in water. Technically, solvent dyes are soluble in non-polar mediums and solvents. This categorization refers to the solvent’s structure, chemical makeup, and charge that decides and identifies the types of substances and materials it can dissolve. Non-polar solvents are those which contain bonds between atoms with similar electronegativities, e.g., carbon and hydrogen. This is why solvent dyes are beneficial for colouring hydrocarbons and fuels. A few types of organic solvents in which this dye can be dissolved are alcohols, ethers, ketones, aliphatic hydrocarbons, aromatic hydrocarbons, oils, fats, waxes, and chlorinated hydrocarbons. Other non-polar solvents include alkanes (like pentane, hexane, and heptane), aromatics (like benzene, toluene, and xylene), acetic acid, chloroform, diethyl ether, ethyl acetate, methylene chloride, pyridine, etc.

Applications and Uses of Solvent Dyes

Solvent dyes have a wide range of applications and use across many industries. Mainly solvent dyes have more uses in the plastic and petroleum industries as these dyes have substantial benefits in fuels, oil lubricants, grease, wax, and plastics colourations. Here are a few popular solvent dyes with their applications.
  1. Solvent Yellow 124 [ C.I. No – 111155] This yellow azo dye is a marker dye as it is mainly used as a fuel dye in the European Union. It is usually to impart green colour to diesel oil. This is primarily done to stop the misuse of low-tax diesel. This green colour identifies that diesel as low-tax fuel. It is also called the Euromarker. Some other applications include imparting colour to materials like plastic, polymer, rubber, fibre, wax, paint, oil, lubricants, and printer inks.
  2. Solvent Red 26 [ C.I. No – 26120] This solvent dye is a purplish red synthetic azo dye soluble in oil but insoluble in water. It is a general fuel dye used to distinguish fuels in the USA. The EPA and the US IRS use it to identify fuels with a higher sulphur content and differentiate low-taxed or tax-exempt heating oil from car diesel fuel, respectively. Other uses of this dye are to give colour to fat, oil, wax, and acrylic resin. It may also be applied in the production of paint coatings as well as ink coatings. These inks are also used in proton radiation therapy.
  3. Solvent Violet 13 [ C.I. No – 60725] This is a bright bluish violet synthetic anthraquinone dye. This dye gives colour to hydrocarbon products and materials like solvents, petrol, thermoplastics, polystyrene, hard polystyrene, various resins, plastics, PS, HIPS, ABS, PC, RPVC, PMMA, SAN, AS, PET, etc. It is also to be used in terylene protoplasmic colouring. This dye is also used to colour cosmetic products meant for hair and skin. It is also used to dye synthetic textile fibres.
  4. Solvent Blue 36 [ C.I. No – 61551] This anthraquinone dye has applications in industries like Paint, Petroleum & Plastic. This dye is generally used to give colour to products, materials, and substances like acrylic resins, polystyrene, oils, inks, etc. It is also used to make fireworks, as this dye gives the smoke a bluish-violet colour.
  5. Solvent Red 164 [ C.I. No – N.A.] Like Solvent Yellow 164, this dye is also a fuel dye. Its primary use is to identify fuels with a greater sulphur content and to differentiate low-taxed heating oil from diesel fuel. Some hydraulic fluids and other hydrocarbons, mostly gasoline, are also dyed with them. It is also applied in the colouration of materials like polystyrene, ABS resin, polymethyl methacrylate resin, acetate, PVC, etc. This dye is also used in polyester fibre protoplasmic colouring.
  6. Solvent Orange 60 [ C.I. No – 564100] This dye has various applications due to its properties of high fastness and good temperature resistance. This dye gives colour to polystyrene, PS, HIPS, ABS, PC, RPVC, PMMA, SAN, AS, PET, resins, polymethylmethacrylate, unplasticized PVC, and other kinds of plastics. This dye is also used in the colouring process of estron, Capron, terylene, polyester, and PA6 fibre.
  7. Solvent Red 135 [ C.I. No – 564120] This dye imparts a yellowish-red shade. It has great heat resistance, light and weather resistance, excellent fastness to migrate, and high tinting strength. It is an effective dye for high-performance products like PET blowing and spin dyeing. It gives colour to materials like polystyrene, ABS resin, polymethylmethacrylate, cellulose acetate, rigid PVC, rubber, and plastic rubber. It is also used in polyester fibre protoplasmic colouring and terylene protoplasmic colouring.

Types of Solvent Dyes

The many industries that use solvent dyes use a wide range of different types of dyes manufactured and produced by solvent dyes manufacturers. Many different colors exist, like Solvent Yellow 2, Solvent Red 23, Solvent Blue 4, Solvent Orange 7, and many more. But these colours are mainly grouped into a few general categories, each containing more specific colours according to needs and uses. These groups are:
  1. Solvent Black
  2. Solvent Blue
  3. Solvent Brown
  4. Solvent Green
  5. Solvent Orange
  6. Solvent Red
  7. Solvent Violet
  8. Solvent Yellow

Features of Solvent Dyes

  1. Solvent dyes possess high heat stability, allowing them to retain their physical and chemical characteristics under high-heat applications. This is why these dyes are perfect for use in fuels, automotive lubricants, and transmission fluids.
  2. These dyes are also of high concentration. This means they can be used in very low and minimal amounts to impart colour. This leads to zero changes to the product/material’s characteristics.
  3. Due to their high thermal resistance, these dyes also possess resistance against corrosion.
  4. These dyes have good light fastness, and in terms of colour, their quality and consistency are terrific.

We at Saujanya Exports are solvent dyes exporters and organic pigment powder manufacturers. We also manufacture and export many other types of dyes and pigments, and we are one of India’s leading manufacturers, exporters, and suppliers of dyes and pigments.

To take advantage of our high-quality products and to benefit from our 50+ years of experience in this field, visit us at or write to us

How are Fast Bases used in Textile Industry?

How are Fast Bases used in Textile Industry?

What Are Fast Bases?

Fast Bases are a type of base dye that is used in the textile industry. Bases dyes are a type of organic bases that are a kind of dye themselves or they can become dyes when combined with acids to make salts. They are called fast bases due to their characteristic of possessing excellent fastness properties.

Fastness refers to the property of any material being able to resist any change in its colour characteristics as well as the transfer of its colour to other materials. Basically, fastness refers to the ability of any material to resist the fading and bleeding of its colour.

Properties of Fast Bases

  1. Fast bases possess a high degree of light fastness. Light fastness means the duration and degree to which a material can resist the fading and reduction of its colour against light exposure.
  2. Fast bases are known for their vibrance and beauty, the brightness of their shades and their overall fastness.
  3. Fast bases are quite sensitive to heat and moisture.
  4. They need to be stored in a cool dry place at all times.
  5. They are freely soluble in water.

Types of Fast Base Colours

The following are the variety of colours available in fast bases:

  1. Fast Garnet
  2. Fast Red
  3. Fast Scarlet
  4. Fast Orange
  5. Fast Yellow
  6. Fast Violet
  7. Fast Blue
  8. Fast Bordeaux

Each of these main types also has sub varieties like Fast Red R Base, Fast Red RL Base, Fast Red ITR Base or Fast Scarlet GGS Base, Fast Scarlet R Base, Fast Scarlet RC Base or Fast Blue B Base, Fast Blue BB Base, etc.

Azo Dyes

Fast bases are also known as azoic diazo components. These azoic diazo components are used as one of the components of making azo dyes. Britannica defines azo dyes as. “any of a large class of synthetic organic dyes that contain nitrogen as the azo group ‘―N=N―’ as part of their molecular structures”. Hence any dyes containing the functional group ‘―N=N―’ are called azo dyes.

Azo dyes are created using azoic diazo components [aka fast bases] and a coupling component. E.g. An aniline, which is a primary aromatic amine when treated with nitrous acid, produces a diazonium salt. This salt then reacts with the coupling component to transform into a dye, which is used to dye and colour materials. This dye is also an azo dye and can be used as direct and disperse colourants.

Azo dyes are one of the most popular and most used dyes in the textile industry.

Dyeing Process with Fast Bases

There is a process involved when dyeing using fast bases as they are used in creating other dyes. Therefore, this process can be carried out by anyone ranging from home dyers to fast, base manufacturers themselves.

The process is as follows:

Stage 1- The fibre is applied/coated/infused with naphthol. Naphthol is a phenol that is soluble in alkaline solution and is also substantive to cotton, especially in the presence of salts.

Stage 2- After the fibre/material is coated with naphthol, it is combined with a diazotized base or salt. An example of such salt would be azo dyes which are mentioned above. This combination happens at a low temperature which generates an insoluble dye molecule in the fibre.

The dyes formed from this process are one of the only types of dyes that can create colours like deep orange, red, scarlet and Bordeaux shades that too with properties like excellent light and washing fastness. The colours produced are bright.

Other Applications in Textile

A few applications of fast bases in the textile industry other than azo dyes include
  1. They are used in the production and creation of African prints and wax prints as well as many block prints.
  2. Fast blues and other fast bases are used to produce pigments.
  3. Naphthol dyes are useful for dyeing cotton, silk, and rayon, as well as being useful in the handloom industry for dyeing cellulosic fibres.

We at Saunjanya Exports are one of India’s leading fast base exporters and manufacturers. We produce, manufacture, and export fast bases and other products like food colors, dyes, pigments, and more.

To know more about our range of high-quality products and services, visit us at or write to us

Synthetic Food Colours and Applications

Synthetic Food Colours and Applications

We at Saujanya Exports are synthetic food colours suppliers and manufacturers among other types of colours, dyes and pigments. We have been in this business for over 50 years and have accumulated a lot of experience. Through this blog, we want to share all there is to know about synthetic food colours. 

What Are Synthetic Food Colours

Food dyes are chemical substances that are used to enhance and augment the appearance of food by imparting it with a synthetic colour. Food colours are dyes, pigments and colourants used to impart colour onto foodstuff, food items, and different kinds of food. E.g., a red lollipop has that colour due to the addition of food colour into the candy.

A synthetic food colour is a chemical compound that has been created in a laboratory. Synthetic food colour manufacturers create these artificial colours by usually combining and mixing two or more dyes or pigments into an entirely new compound. This resulting chemical compound is used to give foods their bright and vibrant colours.

Food colouring is not a new concept at all as colours have been added to food for hundreds of years but synthetic colours are indeed a newer and recent concept. The first artificial food colour was made in 1856 from coal tar.

Types of Synthetic Food Colours

Regulatory agencies like the US Food and Drug Administration [FDA] and the European Food Safety Authority [EFSA] manage and regulate the usage of synthetic colours. They allow only a few types of synthetic colours to be used in food. They are:

  1. Yellow No. 6/Sunset Yellow: This colourant of orange-yellow colour which has applications in candy, sauces, baked goods and preserved fruits.
  2. Yellow No. 5/Tartrazine: This colourant of lemon-yellow colour which has applications in candy, soft drinks, chips, popcorn and cereals.
  3. Red No. 40/Allura Red: This colourant of dark red colour which has applications in sports drinks, candy, condiments and cereals.
  4. Red No. 3/Erythrosine: This colourant of cherry-red colour which has applications in candy, popsicles and cake-decorating gels.
  5. Blue No. 2/Indigo Carmine: This colourant of royal blue colour which has applications in candy, ice cream, cereal and snacks.
  6. Blue No. 1/Brilliant Blue: This colourant of greenish-blue colour which has applications in ice cream, canned peas, packaged soups, popsicles and icings.

The USFDA and EFSA have a few exceptions. E.g., in the US, the FDA allows Green No. 3 or Fast Green FCF unlike the ESFA and in Europe, the EFSA allows Quinoline Yellow, Carmoisine and Ponceau unlike the FDA.

In India, the regulatory agency is called the National Food and Drug Administration and Control (NFDAC). The following food colours are permitted in India: Yellow No. 6/Sunset Yellow FCF, Yellow No. 5/Tartrazine, Red No. 3/Erythrosine, Red No. 18/Ponceau 4R, Red No. 10/Carmoisine, Green No. 3/Fast Green FCF, Blue No. 2/Indigo Carmine, Blue No. 1/Brilliant Blue FCF.

In all, there are 3 main categories of food colours. They are Primary Food colours, Blended colours and Lake Colours. In detail they are:

Primary Food Colours

Primary food colours are water-soluble colours that have many different uses in both food and other industries. Other than in food they are used in pharmaceuticals, cosmetics and many other industries. Some types of primary colours are Quinoline Yellow, Carmoisine, Tartrazine and Erythrosine.

Blended Food Colours

Blended food colours are such colourants that are made by combining and mixing different types of primary and secondary colours. Types of blended colours are Dark Chocolate Blended colours, Apple Blended colours, Coffee Brown Blended colours and Egg Yellow Blended colours.

Lake Food Colours

These colours are used in those cases where other types of colours are ineffective due to their solubility. Lake colours are insoluble in water. They are used in confectioneries, baked goods, spices, dairy products, beverages, etc. Types of lake food colours are Lake Quinoline Yellow, Lake Tartrazine, Lake Sunset Yellow FCF and Lake Erythrosine.

Merits of Synthetic Food Colours

Synthetic food colours have several advantages over natural dyes. They are cheaper as they are easier to source and they are easier to produce. They also don’t contain any potentially harmful heavy metals such as cadmium, mercury and arsenic.

Synthetic food dyes are used to improve the appearance of food which helps consumers and customers find foodstuffs to be more appealing. E.g., babies and kids can be persuaded to eat food they dislike if the food is of appealing colour and look.

Also, unlike natural colours, they are brighter, more stable, cheaper, and available in a wider range of colour options.

Demerits of Synthetic Food Colours

While much of the demerits of synthetic colours has reduced as they are now only allowed to be used after extensive research and testing by regulatory agencies. A few demerits include the fact that research shows that these colours may cause hyperactivity in sensitive children. There is also a chance that some colours may contain contaminants that may be carcinogenic, though further extensive research is needed to prove this. There is also a high possibility that many people may have allergic reactions to synthetic food colours.

Applications of Synthetic Food Colours

These are some of the various applications and uses of synthetic food colours:

  1. Baked Goods: Synthetic food colours are used in biscuits, cakes, etc to impart colour into them. They are also used to colour cake decoration materials like buttercream and fondant.
  2. Beverages: Colours are used in the manufacturing of cold drinks, soft drinks, energy drinks, juices, dry mixes etc.
  3. Confectionery Items: These colours are used to make jellies, chewing gum, cream/paste, gums, etc.
  4. Dairy and Ice cream: These colours are used to give colour to various dairy products including ice cream. E.g., strawberry ice cream.
  5. Other Uses: In addition to the above uses, synthetic food colours are also used to give colours to meats, savouries, seafood, pet food, etc.
Saujanya Exports is a synthetic food colours exporter, supplier, and manufacturer and one of India’s leading natural and synthetic food colour brands. We are a Government of India recognized export house and are known for our unyielding belief in quality over quantity. To know more about what else we manufacture and supply, visit us at

All About Organic Pigment Powders

All About Organic Pigment Powders

Pigments are substances that are able to impart colour to other materials, substances and things. They are colourants that are used to give colour to objects or materials. They are known to be insoluble in water and other solvents. Organic pigments consist of and are composed of carbon chains, compounds and rings. These carbon components make organic pigments very stable.

The majority of pigments used are dry colourants that are often crushed into a fine powder and utilised in the manufacturing industry and the visual arts industry. This powder is combined with a binder which is a mostly neutral or colourless substance that holds and suspends the pigment to create a liquid/fluid colour like paint. This is why there is virtually no difference between pigments and powder pigments, they ultimately are used to achieve the same objective of imparting colour.

Organic pigment powder manufacturers like us; Saujanya Exports, use these very powders to create our colours and pigments. Usually, pigments are manufactured using a simple process that contains washing, drying, powdering and mixing into a colour.

Classification of Pigments

Pigments are divided into 2 categories, namely Natural and Synthetic. Natural pigments are such colourants that can be sourced from natural materials and synthetic pigments are those that are created through chemical and man-made means.

Both Natural and Synthetic pigments are then further categorised into 2 different types, namely Organic and Inorganic pigments. Natural inorganic pigments include substances like iron oxide and lead oxide while examples of synthetic inorganic pigments include sulphides and chromates.

Natural organic pigments are subdivided into colourants sourced from either vegetables or animals. E.g., In the case of the first category, Saffron or Kesar contains crocetin and crocin antioxidant compounds which are also called carotenoid pigments. These pigments are found extensively in nature in plants, bacteria, etc. They impart yellow, red, orange, and purple colours. In the case of the animal category, the pigment Carmine which imparts a bright red colour is sourced from the shells of cochineal insects.

Synthetic organic pigments are sub-divided into 2 types, namely Azo and Non-Azo:

  1. Azo dyes types are any synthetic organic pigments that contain the functional group ‘―N=N―’ as part of their molecular structures. These can include fast bases, acid orange, etc.
  2. Non-Azo types are any synthetic organic pigments that do not contain the functional group ‘―N=N―’ as part of their molecular structures. These include precipitated basic dyes, precipitated acid dyes, phthalocyanic pigments, quinonoid vat dyes, quinacridone 

Also, synthetic organic pigments are known to be generally sourced from aromatic hydrocarbons like coal tars as well as other petrochemicals.

Types of Organic Pigments

Organic pigments come in the following types:

  1. Carbon pigments: Examples include Carbon Black which comes from natural gas, Acetylene Black from Calcium Carbide, and Lamp Black which is derived from the soot of imperfect combustion of natural oils.
  2. Lake pigments: Lake colour or lake pigments are pigments derived from precipitating soluble dyes in metallic salts. Some examples of lake colours include indigo lakes, carmine lakes and rose madder lakes.
  3. Non-ionic organic pigments: These pigments are usually of azoic type. They include diazo pigments, monoazo pigments which produce colours in the reddish-yellow spectrum, polycyclic pigments, phthalocyanine pigments such as phthalocyanine blues and greens, perylene pigments, perynone pigments, anthraquinone pigments, quinacridone pigments which produce red, violet and oranges, dioxazine pigments which produce violets, thioindigo pigments, isoindolinone pigments which produce yellow, orange and reds, pyranthrone pigments, and quinophthalone pigments.
  4. Alizarin Pigment: This is produced through the root of the madder plant. It is also called Madder red and it imparts shades of red and red-purple.

Difference between Organic and Inorganic Pigments

  1. Compared to inorganic pigments, organic pigments are typically brighter and have greater tonal quality. However, this colour usually fades quickly. Because inorganic pigments are likely to retain their colour better than organic pigments when exposed to light and heat, manufacturers tend to favour them.
  2. Though relatively stable on their own, organic pigments break down and dissolve more readily than inorganic pigments in organic solvents and heat. Therefore, inorganic pigments often exhibit greater dependability and reliability.
  3. There is a difference in the range of colours that are available in both types of pigments. Inorganic pigments have a greater range of colours available.
  4. Organic pigments need to go through a complex and long process for production and availability. Due to this manufacturing difference, organic pigments are less economical.
  5. Organic pigments are harder to disperse in comparison to inorganic pigments.
  6. In terms of types of fastness, organic pigments possess poor to good light and heat fastness while inorganic pigments possess good light and heat fastness. Though in terms of chemical fastness, inorganic pigments perform poorly while organic pigments perform excellently.
  7. Organic pigments are generally stronger when compared to inorganic pigments.
  8. Due to the better reliability and higher number of applications for inorganic pigments, pigment manufacturers, suppliers and exporters tend to lean toward the use of inorganic over organic pigments.
  9. Though organic pigments are used along with inorganic pigments in a combined form on a lesser scale in many applications. This is done because the resulting quality of colour is good.

Applications and Uses of Organic Pigment Powders

Uses and applications for organic powder pigments include tinting wood fillers, used for wood finishing, used for the colouring of inks, paints, rubber products, plastic products, waxes, etc. They are also used to colour textiles and cosmetic products like blushes, eye shadows, and lipsticks. They are also used to colour concrete, plastic resins, wood putties, epoxy paints, etc.

Characteristics of Organic Pigment Powders

  1. Organic colours are transparent in nature but they still have bright and rich colours. They impart strong colours despite their transparency.
  2. They possess lightness in weight which helps them create a high volume of colour.
  3. They possess a small particle size, usually as small as 0.01 microns.
  4. They possess a certain resistance to wetting as they are insoluble in nature.
  5. Their tinting strength is high.

We at Saujanya Exports are one of India’s leading organic pigment powder suppliers and exporters. Furthermore, we also manufacture a variety of other dyes, pigments, and colours that have a host of various applications. To know more about us, visit our site at

Application and uses of Acid Dyes

Application and uses of Acid Dyes

What are Acid Dyes?

Britannica defines acid dyes as “any bright-colored synthetic organic compound whose molecule contains two groups of atoms—one acidic, such as a carboxylic group, and one colour-producing, such as an azo or nitro group.”

They are known as acid dyes not because they have acidic properties but because they are applied to materials from a dyebath within acidic or neutral conditions.

Acid dyes are generally used for textile dyeing. They are utilised in dyeing natural fibers like wool, silk, jute, etc., synthetic fibres like nylon, and can also be used to dye a blend of these types of fabrics or fibres as well. Acid dyes have many other uses other than textile dyeing as well.

Types of Acid Dyes

Acid Dyes are classified in different ways. They are usually classified according to their leveling performance, dyeing properties, and acidic power. The types and classes of acid dyes are:

Classification By Levelling Performance:

  1. Acid Dyes with Good Levelling Performance: Such acid dyes can provide good light fastness but have a lack of substantive indicated by their poor wash fastness. The dye molecules don’t attract much towards the fibre and hence they migrate slowly onto the fibres.
  2. Acid Dyes with Average Levelling Performance: Such dyes have a moderate substantive. To ensure the substantive, a weak acid like acetic acid is used in the dye bath. They have fair washing fastness and good light fastness.
  3. Acid Dyes with Poor Levelling Performance: Such dyes are also known as fast acid dyes, milling dyes or natural dyeing acid dyes. They have an advanced substantive but in contrast, their levelling performance is low and poor.
Classification By Dyeing Properties

This class of acid dyes are classified according to their dyeing behaviour, dyeing pH, migration ability, and washing fastness. These dyeing properties are further decided by their molecular weight and the degree of sulphonation. The types are;

  1. Acid Levelling Dyes: Such dyes can colour evenly. They are combinable in trichromatic shades. They have low wet fastness.
  2. Fast Acid Dyes: These dyes are usually mono-sulphonated. They possess excellent wet fastness but also possess good migration properties, unlike leveling dyes.
  3. Acid Milling Dyes: These dyes have medium to high wet fastness and come in bright, strong colors. Though some milling dyes in pale shades have poor light fastness.
  4. Metal Complex Dyes: These dyes come in duller shades. Metal and Dye ions are combined to form these complex metal dyes. They have high light fastness and wet fastness.

Classification By Acidic Power:

  1. Neutral acid dyes
  2. Weak acid dyes
  3. Strong acid dyes

Uses & Applications

Acid dyes have a variety of different uses. They are used in many different industries and sectors for various types of applications.

A few textile applications and uses according to the type of dye:

  1. Fast Acid Dyes: Used for dyeing or colouring non-washable knitting yarns, carpet yarns and piece goods. It is possible that a few pale-medium shades of fast acid dyes may be able to be hand washed.
  2. Super Milling Dyes: These can be used to impart bright shades onto products or materials like loose stock, sliver, and yarns that need high wet fastness. They can also be used to impart pale-medium shades that can be machine-washed.
  3. Acid Levelling Dyes: Such dyes can be used to dye or impart colour onto materials like carpet yarn, woollen and worsted fabrics, and such textile products that do not need washing and perspiration fastness.
  4. Acid Milling Dyes: This type of acid dye can be used to impart medium-heavy bright shades on products like piece goods and materials like carpet yarns, knitting yarns, and weaving yarns.
  5. Metal Complex Dyes: Due to their fastness properties, these acid dyes are used to dye womenswear and hosiery and other materials like leather, wood, metals, plastics, etc.

Within the textile and fashion industry, acid dyes have many other uses. Furthermore, they also have uses and applications in other industries other than the fashion and textile industry. They all are:

  1. Medical Industry: Acid dyes are used in the field of Histology for the purposes of research or diagnosis. They are used to stain or colour basic tissue proteins in microscopic examinations.
  2. Food Industry: Acid dyes are used as food colouring in the food industry. They must be approved as being eligible for consumption before use. They are used in bread, condiments, frosting, etc.
  3. Leather Colouration: Due to acid dyes being resistant to migration, they are ideal to colour leather. Usually, all types of acid milling dyes and metal complex dyes are applicable here.
  4. Dyeing of Fur Skins: Due to a few of their properties like fastness, good exhaustion and combinability at 60 to 65 °C, and being able to impart only a light stain as well as trichromatic shades, acid dyes are good for fur skin dyeing.
  5. Dyeing of Double Weave Cloths: One of the dyes used to impart colour only double cloths are metal complex non-bleeding dyes. Double weave cloths or just double cloths are a type of woven textile where different sets of materials like sheep skins, weft yarns, etc are interconnected to form 2 layered cloths.
  6. Wood Staining and Coating: Wood is stained with colour to make it more attractive or to add colour to it. They can be stained in natural wood tones or another colour entirely. For this staining process, generally solvent soluble acid dyes are used. Acid dyes like metal complex dyes are also used to coat stained wood to increase durability and protection.
  7. Ink Formulation: Acid dyes can also be used to make ink for different uses like ink-jet printers, ink pads, ink for ball pens, ink for markers, etc. coloured ink in trichromatic form can also be made.
  8. Jute Dyeing: Jute fabrics and fibres are generally highly demanded to be bright, wash fast and light fast. For this reason, acid dyes with good light fastness properties are used to dye jute.

Saujanya Exports is a leading acid dye manufacturer and exporter in India. We also manufacture and export food colours, dyes, pigments, and chemicals.  We use cutting-edge technology to manufacture the best products and believe in high-quality service.

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Lake colours and industrial applications

Lake colours and industrial applications

What are Lake Colours?

Britannica defines lake pigments as, “any of a class of pigments composed of organic dyes that have been rendered insoluble by interaction with a compound of a metal.”

Lake colours or pigments are a type of colourant that is insoluble in nature. They colour by
dispersion. Lake pigments are manufactured from a dye by precipitating the soluble dye with an inert binder or mordant which is usually a metallic salt.

Lakes are able to be dispersed in oil (though they mostly don’t dissolve in oil). Hence, they can be mixed with oils, fats and sugars.

Lakes are also colour stable which means that they can resist bleeding. Bleeding refers to the property of dyes transferring from one part of the product to another.

Difference between Lakes, Dyes, and Pigments

Lake colours are a type of pigment and they differ in property from pigments in general and dyes.Let us understand the differences:

  • Lake colours are made by precipitating dyes with a metallic salt and they are insoluble.
  • Pigments are those types of substances that are used to impart colour to other materials.They are both organic as well as inorganic and they are not soluble in nature. They are Ultra Violet stable.
  • Dyes are chemicals that also impart colour to other materials, similar to pigments. The difference lies in their solubility. Dyes are water-soluble and they show colour when dissolved in water. They are easily dispersible and can’t mix with oil.

How are Lake Colours used in different Industries?

We at Saujanya Exports being lake colour manufacturers and exporters are heavily involved in colours and pigments and hence we possess extensive knowledge about the uses of lake colours. Lake colours have the advantage of being able to be utilized in many different industries and diverse applications. Let us find out about them:

1. Cosmetics Industry

Aluminium lake colours are usually used in the cosmetics industry. They are used to provide tints and colours to various cosmetic products. While makeup products are where lake colours have the greatest potential, lake colours are used in other parts of the cosmetics industry as well.

In makeup, lake colours are quite useful as they don’t bleed colour unlike dyes and they also result in very bright hues which is a big benefit in makeup. A few products where lakes are used are:

– Eye Products – Eyes are one of the most mobile parts of the body and so, such pigments are needed that won’t smudge due to blinking. Lakes come in here as the ideal choice due to

their stability and insolubility.

– Lip Products – Owing to their insoluble nature, lake colours resist the bleeding of colours
which makes them perfect for making the best lipsticks.

Nail Products – Due to their colour stability and insolubility, lakes are perfect to impart colours onto nail polishes.

– Blushes – Lake colours result in bright intense colours that are also available in powder form,this is great for using them in the manufacturing of blushes.

Lake colours used in this industry include Brilliant blue lake, Amaranth lake, Sunset yellow lake,Indigo carmine lake, Quinoline yellow lake, Allura red lake, and others.

2. Food Industry

The food industry has vast applications for colour additives. Colours are used in just about every food product in present times and lake colours are no different. Colours are added to the food product during the manufacturing process. Some areas where food colours are used are:

  1. Confectionaries
  2. Bakery Products
  3. Dairy Products
  4. Desserts
  5. Seasonings
  6. Spices
  7. Beverages
  8. Pet Foods

Food colours come in 2 types; dyes and lakes. Dyes are used in various products like dairy, pet food,beverages, and are water-soluble. They are available in the form of powders, granules or liquids.

Lakes come in both natural food colors as well as synthetic food colours. They are insoluble in nature and so they are beneficial to be used as colourants in foods that are oil-based and fat-based or those which contain oils and fats. They are also useful in products that have less moisture like the coatings of tablets, cheese, margarine, chewing gum, chocolates and others. A commonly used lake pigment in the food industry is Aluminium lake. Furthermore, synthetic food colours include Tartrazine, Sunset yellow, Allura Red, etc, and natural food colours include organic caramel, beta-carotene, carmine (which is extracted from bodies of insects) etc.

3. Textile Industry

Dyes and pigments don’t play a part in the actual manufacture of textiles, rather they are used in the textile industry to impart colour onto fabrics and textiles after the products have been made. While not many lake colours are used in this industry, one of them which is used is a type of aluminium lake made from plant extracts. This industry has a higher usage of dyes (some of which can also be used to make lakes as well). They are:

– Mordant dyes and Acid dyes:

  1. Mordant dyes are a type of dye that require a mordant to adhere to the fabric. This
    enhances the fastness of the fabric dye against light, water, and perspiration. These dyes are
    used to colour fabrics like polyester, silk, rayon, acrylic wool, and nylon.
  2. Acid dyes are used to colour protein fabrics and fibres like wool and silk.
  3. These 2 dyes can form insoluble salts with metal ions from metals like calcium and
    aluminium hence becoming lakes.

– Basic dyes:

  1. Basic dyes are also called cationic dyes. These dyes are commonly used to dye fabrics like silk, nylon, wool, and other acrylic fabrics.
  2. They have amino groups and are have the capability to form insoluble salts with inorganic metal-containing acids like phosphotungstic or phosphomolybdic acids. These are then used for printing in textiles

4.Plastic Industry

Lake colours along with other colourants have a wide application in the plastic industry. They are all used to impart colour onto the following materials among many others:

  1. PVC
  2. Optical lenses
  3. Acrylic
  4. Plastic filaments and sheets
  5. Nylon
  6. Polyester resins
  7. Polyamide
  8. Polypropylene
  9. Polycarbonate
  10. ABS

Colourants play an important role in the plastic industry as they are a necessary part of the
manufacturing process and they also play an integral part in the functionality of a product. But adding such colourants can have an adverse effect on the inherent properties of plastic like its impact strength. So, the additives need to be chosen carefully

Both dyes and pigments are used in the industry, though the usage of lake pigments is comparatively lesser than other dyes and pigments. Dyes that are used for plastics, need to be strong, have heat stability and be transparent. Pigments that are used, can be either organic or inorganic. In the end, whatever is chosen needs to be compatible with the base resin so as to prevent colour shift with time.

The following types of pigments are used in the plastic industry:

  1. Organic pigments
  2. Inorganic Pigments
  3. Carbon black
  4. White pigments
  5. Special effect pigments
  6. Aluminium pigments
  7. Others

Within these families of pigments, organic lakes like BONA Lake and Naphthol Lake are used.

Other than this, many research papers have found and concluded the potential of natural lake pigments in the plastic industry as they have the capability to be used as useful eco-friendly colourants for plastics.

Colour Psychology in Pharma Medicines

Colour Psychology in Pharma Medicines

Medicine colors or pharmaceutical coloring agents or color additives are dyes and pigments that are added to pharmaceutical products like tablets and liquids during the manufacturing process along with other additives to give them a color.

Color additives are defined by the U.S. Food and Drug Administration as, “any pigment, dye, or other substance that can impart color to a drug, food, or cosmetic, or to the human body.”

While color additives don’t play any part in the effectiveness of the medicines as they are pharmacologically inactive substances, they do give the products their own identity. Colors are mainly used by the pharmaceutical industry to make the medicines more appealing for customers as well as impart the products with a specific appearance that can be easily identified by customers. E.g., A cherry-flavored pill that is red in color is much more appealing to anyone than a white-colored pill.

Till the mid-20th century, almost all pills were simply white and round, with almost no products having colors. The advent of colors in pharmaceuticals started around the 1960s and increased rapidly in the mid-1970s when softgel capsules were introduced. They came in primary colors then and now products are available in a vast variety of colors and color combinations.

Types Of Colors Being Used In Medicine

In the pharmaceutical industry, the most common colors used for pills and medicines are white, blue, red, yellow, green, and brown. But the types of colors used need to be known in greater detail, as there are different sources for colors as well as different types of colors.

  1. Color Additives Classified By Their Source
  2. Natural Colors: These coloring additives or agents are such that are sourced and produced from natural sources like plants, minerals, vegetables, animals, etc. There are 3 types:
    1. Colors Derived From Minerals: These are colors that are produced using mineral sources. For example, Titanium Oxide and Copper Sulfate.
    2. Colors Derived From Plants: These are colors that are produced using plants as sources. For example, Indigo, Turmeric, and Saffron.
    3. Colors Derived From Animals: These are colors that are produced using animal sources like insects. For example cochineal extract.
  3. Synthetic Colors: These colors are those that have been produced using chemical synthesizing, industrial means, or in laboratories. They have a higher intensity than natural colors when compared. For example, Patent Blue V, and Carmoisine.


  1. Color Additives Classified By Their Solubility
  1. Dyes: Dyes are coloring agents that are soluble in water. They chemically bond to the substrate to which they are being applied. They are mostly organic compounds. For example, Quinoline Yellow and Allura Red.
  2. Pigments: Pigments are coloring agents that are insoluble in water. They need a binding agent to adhere to a substrate. They are mostly inorganic compounds. For example, Red Ferric Oxide and Beta-Carotene.
  3. Lakes: Lake colors or lake pigments are water-insoluble types of synthetic water-soluble dyes which means that they are insoluble in nature. They color through dispersion. Lakes are produced through the precipitation of soluble dyes with some metallic salt. For example, Aluminium lakes.

Importance Of Colors In Medicine

Colors hold a very important place in pharmaceuticals even though they have no use in the effectiveness of medicines. Their contribution is more psychological. Let us understand their importance:

    1. They provide tablets, pills, liquids, and other products with their own brands, identities, and the ability to be easily identifiable and recognizable by consumers.
    2. Adding a coating of color gives many products more stability and hence helps to increase their shelf life.
    3. Due to branding, advertising, and marketing, products are associated with their colors and hence can be immediately identified simply by their color (E.g., Digene has a unique light pink color). This helps consumers differentiate between real products and counterfeits.
    4. It is scientifically proven that people also eat with their eyes, thus, having an orange-flavoured pill that is also orange in color makes it more appealing for consumers to consume the product.
    5. Colors can also help differentiate between dosages. i.e., if the same pill comes in different intensities, having them be different colors will prevent overdosing.


Color additives and pharmaceutical colors have many different uses as they are used for many other things other than coloring medicines. They are also used by other businesses like Natural food color exporters and Inorganic pigment powder exporters.

Coloring agents are used to add or impart color onto and into cosmetic products, toiletries, foods, clothes, and more.

They are produced by different businesses like Natural food color manufacturers, Inorganic pigment powder manufacturers, Lake color manufacturers, Acid dyes manufacturers, and Fast base manufacturers.

Saujanya Exports is a manufacturer and exporter of natural food colors, synthetic food colors, dyes, pigments, and more. We believe in providing high-quality but cost-effective products. We also provide our products in bulk.

The Chemistry of Attractive Food Colours

The Chemistry of Attractive Food Colours

All About Food Colours

Pink defines strawberry, yellow yells lemon, red says apple or cherry, orange defines orange and the list of colours defining the fruits continues. Our eyes decipher the fruit or flavor by looking at the colour and these beautiful dynamics have been set naturally since time immemorial. A group of 8 to 10 colours has been introduced to humans by the nature. Ignited chemical reactions have given us infinite other colours and each colour has its own set of shades from light to dark.

Types of colours are differentiated depending on their solubility, texture, and applications- food colours, cloth colours, cosmetic colours, paper colours, street colours, etc. The basic understanding between Natural colours and Artificial colours is a vital point. Food colours are one of the most important types used in the cooking industry for commercial and domestic purposes.Spilling the colourful beans of food colours lets us dig deep into the types of food colours and their applications. Based on there are 2 types of colours- Natural types of colours- Dyes, Lakes, and Pigments. Natural colours are derived from plant sources such as beet, turmeric, carrot, spinach, saffron, etc. Artificial colours are the result of chemical reactions, additives added to the natural colour, and other mixtures.

A few known artificial colours are allura red, quinoline yellow, brilliant blue, and indigo carmine. Based on the solubility factor there are 3 types of colours- Dyes, Lakes & Pigments.

Saujanya Exports provides a plethora of food colours, rich in quality at your required quantity without any compromise in colour texture and services. Let us sneak into the applications of natural colours and synthetic colours:

Applications of Artificial Food Colours

Natural food colours are generally derived from flowers, fruits, vegetables, minerals, etc. These natural colours are a part of organic food which absolutely harmless. With natural colours in use, no adverse effects occur in the food or through food. Natural food

colours are applied the following food recipes:

    1. Natural food colours like Anthocyanins are used in the making of juices, jelly-like thick jams, fancy flavored yogurts, etc. Since they are red in colour, they are derived from grapes, erries, raspberries, red wine, flowers, etc.
    2. Carotenoids are red in colour derived from beet, tomato, watermelon, guava, wine, hibiscus flower, and carrot and used in the making of juices, ice reams, syrups, and sausages.
    3. Alcohols have a popular natural colour added to it which is one of the most subtle colours in the shades of white- the Carminic acid. It is used in beverages, bakery products, confectionaries, dairy products, meat, and sausages.

Carotenoid, one of the most popping tangy flavors with orange-yellow colour, is used to make ice-cream candies, pancakes,
jams, bakery products, seasonings, soups, and frostings cereals, desserts, and pastries.

  • Purple-coloured Anthocyanin is a natural colour derived from eggplant, purple sweet carrot, and purple sweet potato. It is applied
    in the making of desserts, jelly, beverages and toothpaste.

Artificial colours are the result of chemical reactions between colours and additives. They are the human desired colours formed with just a few drops of colour additives. Artificial food colours rapidly replaced natural colours as they are cost-effective, can form desired colours,are highly accessible, and are more stable in colours. These colours carry low pH, higher stability higher colour intensity, improved appearance and balanced uniformity. There are 3 types of artificial food colours- Primary food colours, Blended food colours, and Lake food colours.

  1. Primary food colours- They are water-soluble and contain a high utilitarian value and showcase colouring powder when dissolved.
    They are vastly used in dyes, cosmetics, pharmaceutical companies for medicines, and other industries. Quinoline yellow is a
    mixture of green and yellow which is used in beverages, bakery products, icing, and confectionaries.
  2. Carmoisine, the water-soluble synthetic colour is used for mocktails, dessert preparation, bakery products, ice cream and sweet meant. The colour appears from rose red to dark maroon, and it is used in multiple food items. As the number of drops increases, the shade gets darker and the taste turns velvety.
  3. Tartrazine- The yellow-coloured synthetic food colour is one of our best serves at Saujanya Exports. Precise manufacturing, testing,
    and analysis of the texture, pH level, and uniformity take place after which it is traded further. This lemon colour is more used in the
    making of pineapple, lemon, and guava-based desserts frosting, ice creams, bakery products, tangy mocktails, etc.
  1. Blended colours- It is the end product of the mixture of primary and secondary colours independently or with one another. The flavor of the blended colours is strong and edible in all ways. A few prominent blended colours are;
  2. Coffee brown blended colour- Saujanya Exports serves proportionate blended colours. The range of brown, light brown, and
    dark brown results in coffee brown blended colour which is used in the coffee mixtures, bakery products, and cosmetics also.
  3. Apple blended colour- Apple blended colour appears like cider and is odorless. It is highly used in esters, mocktails, candles, paraffin
    wax, and soap making.
  4. Dark Chocolate Blended colour- The chocolate industry screams out loud for this blended colour- the dark chocolate blended colour. It is used in baking, ice creams, packaging industry, candies, and much more. Favorite to all a flavor that can be blended in all desserts, is proportionately made at Saujanya Exports Ltd.

Artificial food colours are widely known for their essence, high availability, cost-effectiveness, and sharp tastes. We at Saujanya
Exports manufacture, test, analyze and trade the perfectly required food colours across the world at the quickest.u

Popping Cosmetic Shades With Pigments and Lake Colours

Popping Cosmetic Shades With Pigments and Lake Colours

Chemical Reactions in Cosmetic Industry

While you enjoy colouring your lips with different shades on different occasions,have you thought of the chemistry behind those popping colours? Nude to subtle to vibrant to popping, how are these colours made? In ancient times.natural elements like fruit pulp, beet, and ghee were used as cosmetic products to enhance human beauty. As time evolved, so did the elements.Pigments, dyes, lake colours were introduced which proved to be unharmful for human skin. Cloth industry, cosmetic industry, food, drugs, etc, immediately adapted these colours for manufacturing the respective products. Natural colours were soon mixed with additives and infinite cosmetic colours were produced for eye shadow, lipsticks, blush, and every possible layer. Cosmetic industry became magical, sparkling and attractive as never before. Let us learn together the chemistry of the magical cosmetic world.

Cosmetics are categorised into organic and inorganic colours. The term organic does not define natural and pure as organic farming unlike the real meaning. Organic colours are further divided into dues, pigments, lake colours. Inorganic colours comprise mineral colours such as iron and zinc oxide.

Lake Colours

Lake colours are the foremost type of colours used in cosmetics and drug industry for coating the products. They are insoluble in nature and are produced by precipitation of soluble dyes with some metallic salt. Lake colours
can be easily emulsified into fats, sugar and oils along with dispersion in glycerine, sucrose and glycol. Superior level aluminium lake colours are manufactured and exported by Saujanya Exports to innumerable Pharma
companies and Cosmetic industries.

The need of today’s generation is to wear harmless and graceful makeup which can be attained through usage of the correct amount of Lake colours. The flexible aesthetics of Lake colours makes it the first choice for all industries. They are highly adaptable, extremely versatile and easily soluble as compared to dyes. Lake colours mix immediately with cosmetic oils which give a creme and glossy effect as end result in makeup products. Lake colours are available in powder and liquid form and their adherence with other substances gives the perfect texture to makeup, frostings, lip balms, dessert pastes etc.


Bubble baths, fizzy baths with wonderful fragrances are our forever favourites.Busy days or relaxed days, a great bath makes it all smooth and fresh. All these shower gels and soaps are composed of chemically composed pigments. Pigments are insoluble unlike the lake colours and are divided into organic and inorganic pigments. Initially, naturally extracted products were
used in soap pigments for safety and durability. Lately, the manufacturing has shifted to labs which have proven to be more safe and consistent. Their use is cost comparatively cheap with availability in several colours. Pour soaps,cold processed soaps and hot processed soaps are all coloured with pigments only for consumer attraction. These pigmented elements contributw equally in the
baking and clothing industries.

All types of organic and inorganic pigments used in bath & body industry, baking and clothing are available with niche quality at Saujanya Exports. The biggest advantage of using pigments is that they are environment friendly causing less pollution in the atmosphere. Pigments are more chosen over dyes as they are cheaper, heat, light resistent, and all other weather conditions. Pigments adheres the colours for more years than dyes under all conditions. All the pigments are analysed and exported by Saujanya Exports without any comprise in quality.

Our hand picked fragrances, coloured cosmetics or clothes, all of it are the results of chemically compost lake colours and pigments in the laboratory. Next time you pick your lip colour or body wash, think about the lake colour or pigment applied to manufacture it.