Potash alum is not considered harmful under normal circumstances. Alum Mordant -Potassium Aluminum Sulfate 99.5% ACS.
CraftyJam Natural Dyeing Iron (Ferrous Sulphate) Modifier/ Mordant
Blue Crystal Growing Set Kit with Alum (Aluminium Potassium Sulphate) making
Potash feldspar - FOR CERAMICS
Ferric Chloride Etching Solution 40% 1L Copper Plate Mordant
CraftyJam Madder Root Chopped Natural Dye Fabrics Red Orange 100% Biodegradable
CraftyJam Natural Dyeing, Fabric, Leather, Paper, Candles, Soaps etc. Multibuy
