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| 1. |
Discuss the use of colloids in Tanning. |
| Answer» Timing: Animal skins are colloidal In nature. When a skin, which has positively charged particles, is soaked in tannin, which contains negatively charged colloidal particles, mutual . coagulation takes place. This results In the hardening of skln weather). Thls process is termed as tanning. Chromium salts are also used In place of tannin. | |