Glass: A Pocket Dictionary Of Terms Commonly Used - Corning ...

weights made at the Clichy factory in France in the
19th century.
Clutha: A type of glass with air traps and specks of
aventurine, patented in the 1890s by James Couper,
Christopher Dresser, and George Walton.
Cluthra: A type of Art Glass developed in the 1920s by
Frederick Carder (1863–1963) at steuben Glass Works in
Corning, new york.
Coil base: A trail of glass drawn out to form a ring or
conical foot on which the vessel stands.
Coin weight: The term popularly applied to islamic
coin-shaped weights or tokens, most of which were
made in Egypt between the eighth and 12th centuries.
Cold colors: Pigments applied as decoration to glass
by cold painting.
Cold painting: The technique of decorating an object
by applying paint such as artists use on other materials.
This is in contrast to enameling, in which powdered
glasses of various colors are fused to the surface by
heating. See also Enamel.
Cold working: The collective term for the many techniques
(such as copper-wheel engraving and cutting)
used to alter or decorate glass when it is cold.
Collar: (1) A band of applied glass around the rim of a
vessel. on bottles, the collar is used to secure the cork.
(2) A threaded metal ring around the font of a lamp,
used to attach a screw-in burner.
Colored glass: Glass that is colored by (1) impurities in
the basic ingredients in the batch or (2) techniques of
coloring glass by one of three main processes: (a) using
a dissolved metallic oxide to impart a color throughout,
(b) forming a dispersion of some substance in a colloidal
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