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| Enamel |
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A pigment of vitreous nature coloured with
metallic oxides and an iron rich glassy frit, fused into
the glass surface by low temperature firing. Enamel colours
may be opaque or transparent. Enameling has been known
since the Roman Egypt and was later used on Islamic glass.
Enamels which melt at high temperatures (750 – 900ºC)
are the best for obtaining bright, shining colours. Powdered
pigment can be stenciled or applied diluted in water on
the glass surface.
A vitreous substance made of finely powdered glass colored
with metallic oxide and suspended in an oily medium for
ease of application with a brush. The medium burns away
during firing in a low-temperature muffle kiln at about
500° to 700° C (965°-1300° F). Sometimes,
several firings are required to fuse the different colors
of an elaborately enameled object. |
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| Enameling |
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A low-temperature firing of clay earthenware
in the muffle kiln, to affix permanently the shine and
luster of glass. |
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| Engraving
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Embossing or debossing onto a surface.
The process of cutting into the surface of an annealed
glass object either by holding it against a rotating copper
wheel fed with an abrasive or by scratching it, usually
with a diamond. |
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| Etching |
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Decoration on the surface of glass by the
use of hydrofluoric acid to etch the exposed design into
the body of the piece on the areas not covered with an
acid resistant barnish (wax, lacquer, oil). |
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