Cotton fabric is subjected to enzymatic hydrolysis with cellulases before and after dyeing. The effects of direct dyes of increasing molecular size on the rate of the en- zymatic hydrolysis reaction are investigated, along with mono-and bifunctional reac- tive dyes with different functional groups. All reactive dyes studied, and especially bifunctional reactive dyes, have a decelerating influence on enzymatic attack. The effect of the direct dyes depends strongly on the enzymatic treatment duration.
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