Discussion
Consider the following statements about washing off a printed fabric.
1. The thickener and unfixed dye must both be removed.
2. Poor washing off leaves a stiff handle and poor rub fastness.
3. Washing off is unnecessary after transfer printing.
Answer: C
Correct answer: All of them
All three are correct. The thickener and any unreacted dye must be removed, or the fabric is left stiff and the loose dye rubs off, so poor washing off shows as both a harsh handle and poor rub fastness. And transfer printing genuinely needs no washing off, because the dye sublimes directly into the fibre with no thickener and no unfixed residue on the surface - one of that process’s main attractions.
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