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Antique Bronze Coloring

To comes firmly attached. Probably, in the case impart a brass or antique bronze color, either of porcelain, biscuit, or stoneware, some of the three following means may be adopt- chemical union of the silicate will take place, ed:-A solution of copper, with some acetic but in other cases the water-glass will only acid. Or:-The means before described for tend to make the bronze powder adhere copper color, with a large proportion of liquid to the surface. After the heating, the bronze ammonia. Or:- Water acidulated with nitric may be polished or burnished with agate acid, by which beautiful bluish shades may tools. be produced. It must be observed, however, this last process can only be properly employed on the alloys which contain a portion of copper.