Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Yellow Enamels
Superior yellow enamels are less easily produced than most other colors; they require but little flux, and that mostly of a metallic nature. I. Red lead, 8 ounces; oxide of antimony and tin, calcined together, each 1 ounce; mix, and add flux IV. (in No.
IV. (in No. 2379), 15 ounces; mix and fuse. the proportion of the ingredients, various shades may be produced.
II. Lead, tin ashes, litharge, antimony, and sand, each 1 ounce ; nitre, 4 ounces; mix, fuse, and powder , and add the product to any quantity of flux, according to the color required.
III. Flux fused with oxide of lead, and a little red oxide of iron.
IV. Pure oxide of silver added to the metallic fluxes. The salts of silver are also used, but are difficult to manage. If a thin film of oxide of silver be spread over the surface of the enamel to be colored, exposed to a moderate heat, then withdrawn, and the film of reduced silver on the surface removed, the part under will be found tinged of a fine yellow.