Chapter XII Depilation
Methods of depilation — Sweating process — Liming — Sources of lime — Quicklime — Slaking of lime — Solubility of lime in water — Analysis of lime — “Available” lime — Action of lime on hide — Liming in pits — Suspension limes — Effect of warming limes — Quantity of lime required — The Buffalo method — Action of old limes — Solution of hide substance by limes — Sodium and potassium hydrates — Payne and Pullman’s process — Alkaline carbonates — Alkaline sulphides — Sodium sulphide — Calcium Sulphydrate — Gas-lime — Tank-waste — Lufkin’s liming preparation — Barium sulphydrate — Realgar, or red sulphide of arsenic — “Inoffensive” unhairing solution — Earp’s patent — Unhairing on the beam — Unhairing machines — Vaughn machine — Leidgen machine — Unhairing in stocks and wash-wheel — Jones machine — Fleshing — Vaughn fleshing machine — Rounding PAGE 119