Dunging
From Wikipedia, the free encyclopedia
Dunging was a process used in textile manufacturing to finish printed textiles, particularly those printed with aluminium or iron mordants.[1] It was a process of exposing mordanted products into a solution of cow dung and hot water.[2] Dunging was used to fix mordants as well as remove unfixed mordants and thickening agents from the fabric.[1][3][4][5]
A mordant is a chemical that fixes a dye on a material by reacting with the dye to generate an insoluble compound.[6]
The treatment got its name from the cow dung that was the primary ingredient used in the formulation.[1][7] Later, the process was substituted by certain chemical substances such as molybdic acid, arsenic, or phosphoric acid or soluble salts of tungstic acid.[8]
