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Leather gets hardened after tanning. Why ?

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asked Dec 18, 2017 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1286

Leather gets hardened after tanning. Why ?

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answered Dec 18, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 23
selected Dec 18, 2017 by sforrest072
 
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Animal hide is colloidal in nature and has positively charged particles. When it is soaked in tanning which has negatively charged colloidal particles, it results in mutual coagulation. This results in the hardening of leather.

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