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Saturday, November 7, 2020

Why alums are used as Mordant in dyeing ?

Alums are used as Mordant in dyeing because when fabric to be dyed in dipped a solution of alum and heated with steam. Hydrolysis of [Al(H2O)6]+3 deposite Al(OH)3 into the fibres of materials and the dye is adsorbed on the Al(OH)3.
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