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

52
Lime: Calcined limestone, which, added to batch in
small quantities, gives stability. before the 17th century,
when its beneficial effects became known, lime was introduced
fortuitously as an impurity in the raw materials.
The addition of insufficient lime can cause crizzling.
Linen smoother: An object believed to have served as
a pressing iron. The earliest linen smoothers date from
the Middle Ages, and the latest were made in the 18th
century.
Lion-mask stem: A hollow stem made by blowing the
gather into a mold patterned with two lion’s masks,
usually separated by festoons. lion-mask stems, first
used in venice in the 16th century, subsequently became
one of the hallmarks of façon de Venise glass.
Lip wrap: A trail, usually of a contrasting color, wrapped
around the edge of the rim. it is also known as an edge
wrap.
Lipper: A glassworker’s tool made of wood in the shape
of a cone and with a handle. it is used to form the lip at
the mouth of a vessel.
Lithyalin (from Greek lithos, “stone”): A type of glass, developed
in bohemia by Friedrich Egermann (1777–1864),
that is opaque and has a marbled surface resembling
semiprecious stones.
Lost wax casting: A technique adapted from metalworking.
The object to be fashioned in glass is modeled in
wax and encased in clay or plaster that is heated. The
wax melts and is released through vents or “gates,” also
made of wax, which have been attached to the object
before heating. The clay or plaster dries and becomes
rigid. This then serves as a mold, into which molten
or powdered glass is introduced through the gates. if
powdered glass is used, the mold is heated in order to