Electro Deposition a Practical Treatise On the Electrolysis of Gold Silver C
Electro Deposition a Practical Treatise On the Electrolysis of Gold Silver C
Alexander Watt
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Red Gold Colour. To produce this colour, the composition known as gilders' wax is used. The article, after being coated with amalgam, . OBMOULU. 207 is heated, and while still hot is suspended by an iron wire, and coated with gilders' wax, a composition of beeswax, red ochre, ver- digris, and alum. It is then strongly heated over the flame of a wood fire ; sometimes small quantities of the gilders' wax are thrown into the fire to promote the burning of the fuel. The object is turned about in ev...ery direction, so as to render the action of the heat uni- form. As soon as all the wax has become burnt off, the flame is put out, and the article plunged into cold water, well washed, and brushed over with a scratch-brush and pure vinegar. Should the colour not be uniform or sufficiently good, the article must be coated with verdigris dissolved in vinegar, dried over a gentle fire, then plunged into cold water and brushed over with vinegar ; and if the colour is of too deep a tone, dilute nitric acid may be substituted for the vinegar.
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