June 13, 2011

Pickling 

The first test strip was removed from the bating solution and placed in a solution of CH₃COOH (acetic acid) and H₂O with a pH of 4.5 to lower the pH of the hide in preparation for tanning. To create his solution 350 mL of H₂O was mixed with 15 mL of CH₃COOH. The hide remained in this solution for 2 hours. 

Alum Tanning

90 mL of H₂O, 30 g of unbleached flour, 30 g of NaCl, 30 g of KAl(SO₄)₂^.12 H₂O (Alum),  and 15 mL of egg yolk (one egg yolk) were combined to form a paste. 

This solution was applied to the test strip.


Dehairing
The second test strip was removed from liming solution and hair was removed in the same manner as was used for the first test strip.


Soaking 

The second test strip was soaked in water to stop the liming process.


Vegetable Tannins

The oak bark pieces were removed from the solution in which they were soaking.