Question

the process of hardening of leather is known as ​

Answer 1

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> TANNING...

Answer 2

Answer:

TANNING

Explanation:

The chemical used in process of tanning is known as Tannin.Animal hide is colloidal in nature and has positively charged particles. When it is soaked in tannin (negatively charged), a colloid, it results in mutual cogulation and gets hardened . Thus, leather get hardened after tanning.