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When alum (potassium aluminium sulphate) is used in dyeing, it is a what?

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When alum (potassium aluminium sulphate) is used in dyeing, it is a what?
posted Sep 15, 2020 by Kapil Kapoor

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1 Answer

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Mordant
The mordant sets the colour in the material being dyed.

answer Sep 16, 2020 by Balwinder
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