potash alum การใช้

• Other chemical products included nitrous oxide and potash alum.
• The leather becomes'tawed'by soaking in a warm potash alum and salts solution.
• It occurs associated with pyrite, marcasite, halotrichite, pickeringite, epsomite, potash alum, melanterite and gypsum.
• The leather becomes tawed by soaking in a warm potash alum and salts solution, between 20 and 30 癈 . The process increases the leather's pliability, stretchability, softness, and quality.