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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. [1] Some acid dyes are used as food colorants, [2] [3] and some can also be used to stain organelles in the medical field. Acid dyes are anionic, soluble in water and are essentially applied from acidic bath.
Acrylic fibers are dyed with basic dyes, while nylon and protein fibers such as wool and silk are dyed with acid dyes, and polyester yarn is dyed with dispersed dyes. Cotton is dyed with a range of dye types, including vat dyes , and modern synthetic reactive and direct dyes.
dye Dyes are color-bearing organic compounds that can be dissolved in water or another liquid so that they will penetrate fibers. [19] dyebath A dyebath is a solution of dye and water or other liquid in which textiles are dyed. [20] dyed in the wool Dyed in the wool or dyed in the fleece refers to fibers that are dyed prior to spinning.
Examples of acid dye are Alizarine Pure Blue B, Acid red 88, etc. Basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. Usually acetic acid is added to the dye bath to help the uptake of the dye onto the fiber. Basic dyes are also used in the coloration of paper.
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. Attachment to the fiber is attributed, at least partly, to salt formation between anionic groups in the dyes and cationic groups in the fiber. Acid dyes are not substantive to cellulosic fibers.
This is a list of dyes with Colour Index International generic names and numbers ... Basic dye 11050 azo 2869-83-2 ... Wool red B Fast milling red B Acid red 115 ...
Acid Orange 7, also known as 2-naphthol orange is an azo dye. It is used for dyeing wool. Preparation It is ...
Laccaic acids are mainly used to dye natural fabrics (mostly silk, wool, or cotton) and food, including both drinks and solid products. [4] It is one of the most common natural dyes, but it is less used in cosmetics than carmine, the main natural dye used in this industry. The bright red colorant gives a lightfast tint to silk and wool.
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