Textile Engineering > GATE 2022 > Dye identification
In a dye identification test, a dyed fabric is immersed in an aqueous alkaline solution of a reducing agent. The colour of the dyed fabric changes and some dye bleeds out in the solution. The correct combination of the fabric and dye is
A
Wool and acid dye
B
Polyester and disperse dye
C
Cotton and vat dye
D
Acrylic and basic dye

Correct : c

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