Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 ... Soft water Black nickel salts No. 2 1 gallon. 1 pound. Stir occasionally before using. Solution should stand at about 1o Baume. Use' solution at 8o Fahr. Current pressure should not be more than I volt. Use regular white nickel anodes. The anode surface should not be more than one half that of the cathode or work surface. The anodes should occasionally be bright dipped. While the work is being plated it will assume various colors, changing from a straw color, through a blue to black. If work shows white streaks the current is too strong, or the anode surface too large, or both. As soon as the proper shade is obtained the work should be taken from the bath, dried, and lacquered. No. 1 brush lacquer is the best for this purpose as it will not show iridescent colors. Cast iron objects should first be brass, copper, or preferably nickel plated before being placed in the bath. Flexible articles, springs, safetv pins, etc., should first be slightly struck in white nickel. The more highly polished the work the better the results. When the solution becomes impoverished it can be revived by adding black nickel salts No. 2 until it stands at 1o Baume. Cyanide Copper Solution. Water Carbonate copper, dry Carbonate soda C. P. cyanide potash.. 1 gallon. % pound. i pound. Yz pound. Add % ounce hyposulphite soda to each gallon of solution for clarifying purposes. Solution should stand at 12 Baume. Use a current pressure of about 34 to 4 volts. Solution may be used cold or hot. First dissolve all of the cyanide in nearly the full quantity of water required, then dissolve the carbonate of soda in this. Mix the carbonate of copper in the water held in reserve, until it forms a thin paste, then stir this paste in the bulk of the solution, after which add the hyposul...
"synopsis" may belong to another edition of this title.
