OCR Text |
Show Electro-Chemical Colors. The preparation of mineral and artificial arti-ficial organic colors by the aid of electricity elec-tricity has made considerable progress and it Is suggested that the products of tbe Industry may eventually roplac those derived from coal tar. Among the colors now produced In commercial quantities by the employment of the electric current are vermilion, Scheel'i green, cadmium yellow, Japanese red, cerise or cherry red, Berlin green tmd nine white, besides a number of organic organ-ic colors. Tfte process consists essentially essen-tially In sending an electric current through a solution containing the elements ele-ments required for the production by precipitation, of the coloring matter desired.- Exchange. |