Question

Why does leather gets hardened after tanning?

Answer 1

the coagulation of positive and negative particles in the process of tanning results in the hardening of leather.

Answer 2

Reason for hardening of leather after tanning process.

• Tanning is the process in which the hide of the animal is converted into leather by changing the structure of the protein present in the hide.
• This process makes the leather progressively solid and resistant to decomposition.
• Tanin the chemical used in process contains a negatively charged colloidal particle whereas leather has a positively charged colloidal particle.
• When the leather is soaked in tannin, due to the difference in charges, coagulation occurs.
• This coagulation leads to the hardening of the leather after tanning process.

Learn more about tanning

Give reasons for the following observations:

(i) Leather gets hardened after tanning.

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