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Alum - Potassium Aluminum Sulfate

100g (3.6oz) - Container
500g (1.1lb) - Container
1kg (2.2lb) - Bag
2.5kg (5.5lb) - Bag


The mordant most frequently used by natural dyers for animal and plant fibers and fabrics. It improves light and washfastness of all natural dyes and keeps colours clear. It is inexpensive and safe to use (but should not be ingested). This form of alum is refined from bauxite, the raw state of aluminum ore, and is free from the impurities some other alums can contain (such as iron).  Use at 12-20% WOF.

Full instructions on handling, safety & use for this product are available on our site - naturaldyes.ca. SDS is available upon request.

Available in different sizes in either a reusable/recyclable plastic container or reusable plastic bag. Our rates reflect a growing discount as the size increases. 

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