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

44
Head flask. Roman Empire, 4th–5th
century A.D. H. 19.6 cm.
to fourth centuries A.D. vessels decorated
with two faces placed back to back are
sometimes known as “janiform” head
flasks (from Janus, the spirit of doorways,
who was represented as a
double-faced head).
Heat-resistant glass: Glass that
withstands thermal shock (severe
changes of temperature). such
glass can be tempered to make it
more heat-resistant, and borosilicate
glasses such as Pyrex are particularly
resistant to thermal shock.
Heat-shaded glass: Glass that shades from one color
to another. For example, Burmese glass shades from
yellow to pink.
Hedwig beaker: A very rare type of thick-walled glass
beaker with relief-cut decoration of lions, griffins, eagles,
and other motifs. Hedwig beakers date from about the
12th century, but their place of manufacture is unknown.
They are so called because one of the surviving examples
is said to have belonged to saint Hedwig of silesia
(d. 1243).
Hinterglasmalerei (German, “painting behind glass”):
See Reverse painting.
Hochschnitt (German, “high cut”): See Relief cutting.
Hofkellereiglas (German, “court wine-cellar glass”):
A drinking glass used in the buttery of a German court.
Hookah (from Arabic huqqa): A bell-shaped or globular
bottle that is part of the water pipe used mainly in the