Alum Tanning
The alum tanning paste was scraped from the test strip and a new layer of paste was applied.
The test strip in the alum solution was left in solution. The solution was stirred because it had separated into a clear layer on top and a cloudy layer on the bottom.
Liming
The two large test strips were added to a solution of 20 g of NaOH and 2000 mL of distilled water. This solution was left to sit over night.
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