potash alum meaning in Hindi

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 �C . The process increases the leather's pliability, stretchability, softness, and quality.

noun.

a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
synonyms：,