- a coloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials.
Origin of smalt
1550–60; < Middle French < Italian smalto smalto
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Examples from the Web for smalt
The inferior kinds of smalt are occasionally adulterated with chalk.
This blue is distinguished from smalt by dissolving in acetic acid.
Ultimately the goods are mill-washed, blued with smalt and dried.
Zaffre is the roasted mineral ground with sand, while smalt, a term used more frequently, is the fused mixture with sand.De Re Metallica
The smalt is usually composed of one part of calcined cobalt, fused with two parts of powder of flint and one of pot-ash.
- a type of silica glass coloured deep blue with cobalt oxide
- a pigment made by crushing this glass, used in colouring enamels
- the blue colour of this pigment
C16: via French from Italian smalto, of Germanic origin; related to smelt 1
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