Chrome-Tanned Leather: Schultz's Two-Bath Process, 1884

A cleaned hide soaked in potassium dichromate, then in sodium thiosulfate with a little hydrochloric acid, turns into soft, strong chrome leather: the second bath turns the chromium inside the skin into the salt that tans it (Schultz, US 291,784, 1884). A thin skin takes about 15 minutes in each bath, a full skin about an hour. The picture: our drawing of the two baths.

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Chrome-Tanned Leather

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Potassium Dichromate from Chrome Ore and Nitre, Ure 1839

by Charlie

Chemistry

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