Alum
Alum

Aluminum Sulfate

$4.00$22.00

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Product Description

This is the mordant to use for protein fibers such as silk and wool, and is the traditional mordant used worldwide since antiquity. Alum is refined from bauxite and is a transparent crystal, resembling salt. We supply a food grade alum that is free of iron and other impurities.

You can use between 10-20% alum on the weight of fiber.  100 grams will mordant about  500 (1.1 lbs) grams of fiber at 20%

Check out our How To Mordant instructions for detailed information on preparing your fibers for natural dyeing.

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