Dehairing
Five methods of dehairing include:
1) clipping process
2) scalding process
3) chemical process
4) sweating process
5) enzymatic process
The most common method is the chemical process which uses lime and sodium sulphide to remove hair follicles. Even though this process is the most efficient, it contributes heavily to pollution. The enzymatic process uses proteases and is a more eco-friendly alternative. It can be used to recover hair stripped during this process as well as when integrated with the chemical process can reduce the sulphide and lime used by up to 40% or decrease the liming time by half. Leather created using enzymes has also shown more favorable properties such as strength, surface area, cleaner grain and softness.
1) clipping process
2) scalding process
3) chemical process
4) sweating process
5) enzymatic process
The most common method is the chemical process which uses lime and sodium sulphide to remove hair follicles. Even though this process is the most efficient, it contributes heavily to pollution. The enzymatic process uses proteases and is a more eco-friendly alternative. It can be used to recover hair stripped during this process as well as when integrated with the chemical process can reduce the sulphide and lime used by up to 40% or decrease the liming time by half. Leather created using enzymes has also shown more favorable properties such as strength, surface area, cleaner grain and softness.