OCR Text |
Show Electro-Chemical Colors. The preparation of mineral nnd artificial arti-ficial organic colors by the aid of electricity elec-tricity has mnde considerable progress and It Is suggested that the products of the Industry may eventually replaci those derived from conl tar. Amonj 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 p.nd jilnc white, besides n number of organic organ-ic colors. The 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. Exchunge. |