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Modern Electro Plating; The Principles Involved in Depositing Gold, Silver, Nickel, Copper, Brass and Other Metals, by Means of Batteries or Dynamos; - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ... CHAPTER XI. GOLD AND ITS USE IN PLATING. Gold is perhaps as little understood by the average piater as any metal with which he has anything to do and its use has apparently drifted nearly altogether into the hands of a few specialists, who guard their secrets with jealous care and easily displace any would-be competitors by their superior knowledge, which enables them to turn out more work of a better appearance with very much less use of the precious metal. And when we consider the great cost of the metal and reflect upon the care that is taken to save and recover it from the wastes by all manufacturers who use it, it will be readily seen that the specialist's position is a very strong one and that a little gold saved is an important item, and when we further reflect that there is no standard of weight of metal deposited on certain articles, as there is in silver, and that, on the contrary the less gold there is to maintain its appearace in most work, the better, it may be 141 readily concluded that the man who can spread the least , gold over the most surface, and make it stick, has an immense advantage over his competitors in nine-tenths of the work done nc.v-aduys. In addition to this, no other metal gives so great a variety of shades or color, hardness and wearing qualities, as does electro-deposited gold. A bath made up of chemically pure chloride of gold and used with fine gold anodes will give anything from a pale 16 karat color up tc 24 karat yellow, or any number of shades of a coppery red, according to the temperature of the bath and the strength of current used. Each of these shades will vary in its hardness, speed of deposition and wearing qualities. Furthermore, a gold bath differs from all other metals in the important...
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