Killing with Soda

Soda is sodium carbonate, which is produced commercially in a very pure state in several different forms, the chief being sal soda, which is crystallized sodium carbonate, containing about 37% of actual soda; and soda ash, or calcined soda, which is anhydrous sodium carbonate. The latter is the variety most commonly used.

10grams soda ash are dissolved in
1liter of water at 25°–30° C.

The skins are immersed for 2–3 hours, after which they are rinsed and treated with

10grams acetic acid dissolved in
1liter of water.

The skins are again thoroughly washed, and then hydro-extracted.