User talk:Dyestuff

The process of imparting colours to fabrics, textile materials, clothes or non-textile materials like leather, resins is called as dyeing. The substances used in this process of coloring materials are generally termed as dyes. These dyestuffs may be classified in various ways: according to color, origin, chemical structure, kinds of material to which they are applied and method of application. Depending on the kinds of materials to which they are applied they can be classified as textile dyes and non textile dyes.

Textile Dyes:

The dyes used for coloring fabrics, textiles or clothing materials are generally termed as textile dyes. A wide range of polyester dyes or acetate dyes are available in the market for textile dyeing. These are generally the disperse dyes that are finely ground in the presence of a dispersing agent and sold as a paste, or spray-dried and sold as a powder. Their main use is to dye polyester, nylon, cellulose triacetate, and acrylic fibers. Cellulosic dyes available now-a-days are the improved ranges of bi-functional and poly-functional reactive dyes and VAT dyes used for warm dyeing and high speed coloring applications. Dyes that form a covalent bond with the substrate during the dyeing process are known as reactive dyes. They offer improved wash fastness, improved brightness, and improved rubbing fastness and shade range. These reactive dyes are capable of directly reacting with the fiber substrate where as this is not the case with VAT dyes which are essentially insoluble in water and incapable of dyeing fibers directly. However, reduction in alkaline liquor produces the water soluble alkali metal salt of the dye, which, in this leuco form, has an affinity for the textile fiber. The Corazol dyes are the Vinyl Sulphone reactive dyes that can be used for all round applications of hot dyeing, exhaust dyeing and high fastness coloring needs. The Cololan dyes are the polyamide dyes used for coloring polyamide fibers, wool and silk products. In order to impart high light and wet fastness to fabrics, acid dyes are best to use. Also known as wool dyes or silk dyes, these acid dyes are water-soluble anionic dyes that are applied to fibers such as silk, wool, nylon and modified acrylic fibers using neutral to acid dye baths.

Non-Textile dyes:

The coloring substances or dyes used for coloring of materials other than fabrics like leather, resins, inks, wood stains etc are generally referred as non-textile dyes. Coloderm dyes fall under the wide category of leather dyes used for leather coloration. Coloring of leather products with these specifically designed leather dyestuffs is easier and most reliable way of coloring all kinds of leather. The Corasol dyes available in the market are the famous varieties of solvent dyes usually used for resin coloration. The dyes that are soluble in organic solvents are known as solvent dyes. Generally these dyes are used to color organic solvents, polymers, hydrocarbon fuels, waxes, lubricants, plastics, and other hydrocarbon-based non polar materials. Mainly used as colors for toilet blocks, the unicol dyes are also used for coloring writing inks and wood stains.

Specialty Chemicals:

Specialty chemicals are the chemical substances that are commercially produced with chemical reactions mainly to be used for technical applications. Used for pretreatment, dyeing / printing, after- treatment and finishing of textiles, Levocol forms most popular range of performance chemicals that add value to the products. Nothing can be better than Levofin finishing chemicals that can impart exclusive feel and handle to the textiles. When it comes to eco-friendly printing thickeners, Printex are the best options for bio-degradable thickeners that can be used for various industrial applications.