Alum, Potassium aluminum sulfate

Alum - Potassium Aluminum Sulfate


Alum - Aluminum Potassium Sulfate (Potassium Aluminum Sulfate) is commonly called potash alum or alum and has been used to mordant wool, silk, and other protein fibers for thousands of years. The Earthues alum (KAl(SO4)2) is Food Grade and contains no appreciable amount of iron contamination. Earthues recommends using 20% wog and then heating the mordant bath with fiber to 200F.