Direct dyes are water-soluble anionic dyes, but are not classified
as acid dyes because the acid groups are not the means of attachment
to the fiber.
定義
A group of dyes that are
mostly azo-compounds derived from benzidene
or benzidene derivatives. They are
used to dye cotton, viscose rayon, and
other cellulose fibers directly, using a neutral
bath containing sodium chloride or
sodium sulfate as a mordant.
