Direct Dyes Dyestuff Anhard Export

The amount of this attraction is known as "substantivity": the

higher the substantivity the greater the attraction of the dye

for the fiber. In contrast to direct dyes, wool and leather

goods are dyed by the process of ion Exchange, exploiting the

cationic nature of proteins near neutral pH. Direct dyes are

anionic dyes with high affinity for cellulose fibres such as

cotton and rayon. They are generally used when high wash

fastness is not needed.

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