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METHODS OF USING MODERN ENAMELS

  Enameling being one of the oldest of the fine arts, and methods changing from time to time to suit different classes of work, we are herein giving a few elementary rules for using modern enamels.

  The first and most essential is to have the work free from grease, dirt, and oxides, CHEMICALLY CLEAN.

  Next heat to redness. Some alloys require more than one heating, the purpose being to burn off from the surface low fusing metals, such as zinc, cadmium, or impurities acquired in working the stock.  When cool boil in pickle composed of thirteen parts of water, and one part nitric acid until all oxide is removed, from the metal of uniform color.  Rinse thoroughly with clean running water until all trace of acid is removed.  Dry with heat if possible, as the practice of using sawdust doe snot leave the metal perfectly clean. 

  When transparent enamels are used the pieces should be bright dipped after pickling. 

  A bright dip composed of one gallon nitric acid, one gallon of sulphuric acid, add four ounces of mutriatic acid and let stand ten hours to cool.  

  The above applies to copper and its alloys.  

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