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White crystalline alum powder in a black bowl

Potassium alum

€1.30 / 100g

Alum natural mordant for better dye adhesion; finely pre‑milled for immediate use.

125 in stock

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Alum is a hydrated double salt and is often used as a mordant when dyeing with natural dyes. Alum was already used by the Romans. It ensures better adhesion of precious dyes to textiles. Our alum is finely pre-milled, therefore it can be used immediately when you start dyeing.

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