Encyclopedia of Practical Receipts and Processes

How to silver a mirror, brew ginger beer, kill moths, make fireworks, tan a hide, bronze iron, cure a ham and clean a straw hat: William B. Dick's numbered encyclopedia answered the questions a nineteenth-century household actually had.

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To Dye with Hoffman's Purple

The dye is prepared as other purples. (See No. 2607.) Some authorities maintain that this color does not require the addition of acid to the dye bath, but the color is apt to rub off when dyed in this manner. A trace of tartar, or of tartaric, oxalic, or any vegetable acid may be used with advantage; but mineral acids are to be particularly avoided. The bath should be kept at a boiling temperature.

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