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单词 Acid dye
释义

Acid dye

英语百科

Acid dye

Anthraquinone derivatives generally form blue dyes
Azobenzene derivatives generally form red dyes
Triphenylmethane derivatives generally form yellow or green dyes

An acid dye is a dye which is a salt of a sulfuric, carboxylic or phenolic organic acid. The salts are often sodium or ammonium salts. Acid dyes are typically soluble in water and possesses affinity for amphoteric fibers while lacking direct dyes' affinity for cellulose fibers. When dyeing, ionic bonding with fiber cationic sites accounts for fixation of colored anions in the dyed material. Acids are added to dyeing baths to increase the number of protonated amino-groups in fibers.

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