On the theory and practice of art-enamelling upon metals (1899)
Cunynghame, Henry H. (Henry Hardinge), Sir, 1848-1935 · Westminster : A. Constable & Co. · leaf 86
potassium. Some people recommend washing it with weaknitric acid, but this does not seem to improve it. Wehave now, out of 30 grammes (an ounce) of enamel,got 15 grammes of fine ground clean enamel, whichwill cover about 8 square inches of copper, and 15grammes of mud. The latter may have the… … Grinding Enamel in an agate mortar, with a pestle attachedto a rod passing through a hole in a bracket, and loaded witha lead weight. EXECUTING LIMOGES ENAMELS colouring matter is separated, and that the enamel be-comes partly decomposed by the action of carbonicacid upon the alkali which it…
Enamel and enameling
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