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Alum (potassium aluminium sulphate)


Our alum is aluminium potassium sulphate. It is a hiqh quality, scientific grade product with no iron contamination.

Alum is used as a mordant in natural dyeing and is our recommended mordant for protein (animal) fibres.

We recommend a ratio of 10g alum per 100g dry weight of fibres.

Alum can also be used in conjunction with tannin for an alum-tannin-alum mordant on cellulose (plant) fibres.

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