The Manufacturer and Builder 3, 1891
Garnier has obtained a chrome blue by melting together, in a lined crucible: Potassium chromate, 48.64 grammes; fluor-spar, 65.0 grammes; silica, 157.0 grammes. The product is a glass of a fine blue, surrounded with a thin layer of metallic chromium, which is capable of being detached. Red, yellow, and green compounds of chromium have hitherto been known, and this last discovery completes the scale of colors, and shows that the metal well deserves its name.
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