Direct dyes is a type of dye which is mostly used for cellulosic materials and proteins fibers such as Wool, silk, nylon
CATONIC DYES
Cationic dyes are dyes that can be dissociated into positively charged ions in aqueous solution. They can interact with the negative groups on the fiber molecules to form salts, which can be further firmly attached to the fibers, thereby staining the fibers.
PIGMENTS TEXTILE DYES CHEMICALS
Sulfur dyes are the most commonly used dyes manufactured for cotton in terms of volume. They are inexpensive, generally have good wash-fastness
Acid dyes are typically used to dye natural protein (wool and silk), synthetic polyamide (nylon) and to a small extent acrylics and blends of these fibers.
Reactive dye is a class of dye that makes a covalent bond with the fiber and becomes an integral part of the fiber. These are usually used to dye cellulosic fibers such as cotton, rayon, or flax, but polyamide, wool, silk, and acetate fibers
Disperse dye is a category of synthetic dye intended for polyester and related hydrophobic fibers.
Acid Dyes
An acid dye is a dye that is typically applied to a textile at low pH. They are mainly used to dye wool, not cotton fabrics.
Based on dyeing characteristics (wool dyeing) acid dye can be classified in,
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Levelling acid dye
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Fast acid dye
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Milling acid dye
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Super milling acid dye
Direct Dyes
Direct dye, also called Substantive Dye, any of a class of coloured, water-soluble compounds that have an affinity for fiber and are taken up directly, such as the benzidine derivatives. Direct dyes are usually cheap and easily applied, and they can yield bright colours.
Reactive Dyes
Reactive dye is a class of dye that makes a covalent bond with the fiber and becomes an integral part of the fiber. These are usually used to dye cellulosic fibers such as cotton, rayon, or flax, but polyamide, wool, silk, and acetate fibers can also be dyed using reactive dyes.
Disperse Dyes
Disperse dye is a category of synthetic dye intended for polyester and related hydrophobic fibers. Disperse dyes are polar molecules containing anthraquinone or azo groups. It is estimated that 85% of disperse dyes are azos or anthraquinone dyes.
