Direct Dyes Manufacturers & Suppliers in India
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Direct dyes are a type of reactive dye that is soluble in water. These dyes are very strong and can be used to dye wool, silk, nylon and other protein fibers. They can also be used to dye cellulose fibers such as cotton, linen and rayon.
Direct dyes are made from coal tar, which is the byproduct of manufacturing coke from coal. The process for making direct dyes involves converting coal tar into aniline, then converting aniline into a dye.
Direct dyes are a class of dyes that are used for the colouring of textiles and other materials. Direct dyes are typically distinguished from other classes of dyes by their ability to color the fibre without the need for a mordant.
With our extensive range of colors and combinations, you can get the right shade as per your requriments.
The two most significant non-textiles utilized are used in the paper, wood, and leather sector.
Coloration of Paper:- The paper industry employs huge quantities of dyes mostly to dye papers (Hand created) and also when light-fastness is an important factor.
Dyeing of Leather:- It is a traditional use of direct dyes.
Pre-treatment:- It is vital to have a good pre-treatment in order for satisfactory dyeing to be achieved. For better quality and brightness, it is essential to have fair depth. Grey fabric should be free of impurities such as the size of the material and spinning oil through making the Grey fabric using alkaline or bleaching at times may be used in cases of lighter shades.
Dyeing
The dye stuff is pasted with cold water and dissolves by pouring boiling water while stirring .The solution may be boiled to ensure complete dissolution. Set the dye bath at 50-60 c temperature with dyes solution, salt and soda ash. The pre-wetted goods are then entered and worked for 15 minutes gradually raise the temperature to 90-95 C and worked for 50-60 minutes, in order to overcome unlevel dyeing salt may be added in part after about 15 minutes of initial dyeing prior to raising the dye bath temperature. The material is then removed, Washed and dried.
The advantages of Direct Dyes are that they are not water soluble, so they can be used in a wide range of applications. They can also be used to dye cellulose and protein fibers.
We also manufactures Acid Dyes, Solvent Dyes, Basic Dyes, and Aluminium Dyes for the textile industry. We are one of the leading suppliers and exporters of these products in Worlwide.
Liquid direct dyes manufacturers, suppliers and exporters in India and cover national and international industries according to request and specifications from last two decades with 100% satisfactions with multiple ranges as described in table formats.
Product Name - ConcentrationDirect dyes are water-soluble anionic dyes that colour cotton and other cellulosic fibres directly, without a mordant. Their long, flat molecules line up along cellulose chains and are held by hydrogen bonds and van der Waals forces.
The best direct dye for cotton depends on the shade and fastness you need, but widely used examples include C.I. Direct Yellow 12, Direct Red 81, Direct Blue 86, Direct Green 26 and Direct Black 22. Choose dyes with good build-up, levelling and the fastness your buyer requires.
In the Indian paper industry, direct dyes are used to colour bleached chemical pulp and finished paper grades such as writing and printing paper, tissue, coloured kraft, board and specialty papers. They have good affinity for cellulose fibres and are applied at the stock stage or size press.
Direct dyes are simpler, cheaper and faster to apply, but reactive dyes give much better wash fastness and brighter shades because they bond covalently to cotton. Direct dyes suit light to medium shades and cost-sensitive products; reactive dyes suit apparel and high wash fastness.
Choose direct when cost and simplicity matter; choose reactive when wash performance is critical
For silk, choose direct dyes with good levelling and adequate light fastness, and dye at about 80–90°C in a neutral to weakly acidic bath. Always test on your own silk.
Direct dyes colour cellulosic materials, mainly cotton, viscose, linen, jute and paper. They can also colour silk, leather, bamboo and cane, but not polyester or acrylic.
Higher temperature (about 90–100°C) increases dye diffusion and uptake in direct dyeing, while a neutral to slightly alkaline pH keeps the dye soluble and stable. Salt then pushes the dye onto the fibre.
Direct dyes are used on cotton and other cellulosic fibres because their long, flat molecules have natural affinity (substantivity) for cellulose and dye it without a mordant. This makes dyeing easy and economical.
Uneven shades with direct dyes are usually caused by heating too fast, adding salt too early or all at once, poor dye dissolving, hard water or uneven fabric preparation. They can be prevented by controlling heating rate, adding salt in portions and using properly prepared fabric.
Before buying direct dyes in bulk, check the C.I. name, strength compared with your standard, shade, solubility, moisture content, fastness data, and compliance with restricted-substance rules, and ask for a COA and SDS for each batch.
