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Why is Ammonia {NH3} is added in some hair colour dyes ?
@ mardana the main purpose of ammonia to be added in hair colour is that it will help open the cuticle layer of hair and allow the colour molecules to penetrate the hair , it also act as a peroxide activator in the colour which is almost required . ammonia is alkaline , therefore it will cause the hair to swell , and open the cuticle . HOPE IT CLEARS ALL THE BEST ..
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