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

the batch, particularly an excess of alkali or a deficiency
of stabilizer (usually lime). The instability of
the glass results in an attack by atmospheric moisture,
which produces a network of cracks in the surface
that may feel damp or oily. Crizzling can be slowed or
perhaps even halted, but it cannot at present be reversed.
Crizzled glass is sometimes described as “sick”
or “weeping.”
Crown glass: sheet glass made by blowing a parison,
cutting it open, and rotating it rapidly, with repeated
reheating, until the centrifugal force has caused it to
become a flat disk. After annealing, the disk is cut into
panes of the required shape and size. Bull’s-eye panes
come from the centers of the disks and preserve the
thickened area where the parison was attached to the
pontil.
Crown weight: A hollow paperweight that incorporates
thin white or colored filigree canes arranged vertically
on the sides and drawn together at the top.
Cruet: A small, ewerlike vessel, usually with a lip or spout,
a handle, and a stopper, for serving condiments at the
table.
Crystal: A popular term for colorless lead glass, which
has a high refractive index and consequently is particularly
brilliant. in the United Kingdom, glass described
as crystal must contain a defined percentage of lead
oxide. Today, the word is often used to describe any
fine glass tableware.
Cullet: (1) raw glass or pieces of broken glass from a
cooled melt, intended for use as an ingredient of batch;
(2) scrap glass intended for recycling.
Cup plate: A small plate on which users set their tea
or coffee cup while drinking from the saucer. between
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