SKU: Alum


$5.85 to $81.90
A white crystalline compound, used in solution for coating paper prior to marbling, for setting dyes on fabrics and other applications. Also sometimes referred to as Potassium Aluminum Sulfate. Al2(SO4)3.K2SO4.24H2O This product looses 18 H2O at 92.5oC and becomes anhydrous at 200oC. It forms cubic or octahedral crystals that are soluble in cold water, very soluble in hot water, and insoluble in ethanol and acetone.

Alum is often used in marbling to help the pigments adhere to the paper.  Check out our "how-to" on alumming paper for marbling.