Dehairing
The two large test strips were removed from the lime solution and the hair was removed from them.
Soaking
The test strips were then added to distilled water to remove excess NaOH.
Baiting
The test strips were added to a solution of 2500 mL of distilled water, 25 g of pepsin, and 40 mL of acetic acid. This solution was heated to 37 C and stirred with the magnetic stirrer on the hot plate. This process continued for 3 hours.
Alum Tanning
The alum paste was left on the test strip.
The alum solution with the other test strip was stirred to recombine the separated layers of the solution.
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