Patent Model - Improvement in Coloring and Hardening Wood

Maker and role
Charles Spicker, Patentee
Production date
Jun 24 1844
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Object detail

15 1/4 x 15 x 1 1/2" (38.7 x 38.1 x 3.8cm)
Spicker's patent is for "The method of hardening and coloring wood by diffusing tannin or tannic acid; together with vegetable colors, throughout the whole structure of the wood, and incorporating the same therewith by the aid of caustic potassa or soda or other analgous substance...and in varying the color afterward by the use of metallic salts, whose base has an affinity for tannin or tannic acid..." (Patent Number 3,635)
Object number
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