Identifier: practicalelectro00brun (find matches)
Title: The practical electroplater. A comprehensive treatise on electroplating, with notes on ancient and modern gilding, and formulas for new solutions
Year: 1894 (1890s)
Authors: Brunor, Martin
Subjects: Electroplating Gilding
Publisher: New York, E. Brunor (etc., etc.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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r every subjecttreated of in this work. It is therefore hopedthat the reader will understand thoroughly the variousprocesses laid before him. Under the head treated of inthis chapter a few rules as to the conduct of work aregiven. In the first case a workshop should be thoroughlyventilated. Each hot bath should be placed under a chim-ney ; but if that is an impossibility a good sized ventilatorwill suit. The reason for this is that the fumes arisingfrom the cyanogen are very unhealthful, as spoken of inanother chapter. Second, there must be two kettlesfilled with potash for cleansing purposes ; one of a lowdegree of strength, from 20 to 40 Baume hydrometer, forremoving the grease from the soft metals, as tin, lead,zinc, britannia metal or similar alloys. The second kettleshould have a strength of from 50 to io° Baume foriron, steel, brass and like alloys. Both kettles should bekept at the boiling point. Third, there should be a jarcontaining hydrochloric acid in which to dip cast and
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GENERAL RULES FOR ELECTROPLATING. 127 wrought iron goods for a few seconds to make the articlesclean and bright. Fourth, there should be two earthenwarecrocks for brass dipping. One jar is for vitriol and water of a strength of io°Baume, usually known as pickle. The brass goods must beput in the pickle for a few minutes before they are placed inthe aquafortis. Then pass them through the aquafortis for afew seconds and afterward place them in the bright dipping.Bright brass dipping is composed of two parts of sulphuricacid, one part of nitric acid, a handful of salt and a handfulof soot. There must also be two gold solutions, one for ob-taining a heavy coat and the other for securing a nicebright color. If the latter becomes so that it does not givea satisfactory rich color the solution must be thrown in thefirst one and a new one made. A copper solution is in-dispensable in the plating room, because cast and wroughtiron, steel, tin, lead and the different alloys of germansilver must

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