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

D Daumenglas
inder is then detached from the blowpipe, and both
ends are removed with shears. next, the cylinder (sometimes
known as a muff) is cut lengthwise, reheated, and
either tooled or allowed to slump until it assumes the
form of a flat sheet. After annealing,
the sheet is cut into panes.
(German, “thumb
glass”): A large cylindrical or
barrel-shaped forest glass beaker
with circular indentations
for the user’s fingers and
thumbs. Daumengläser were
made in Germany and the
netherlands in the 16th and
17th centuries.
Decanter: A decorative bottle
with a stopper, used for
serving wines and spirits.
Decolorizer: A substance
(such as manganese dioxide or
cerium oxide) used to remove
or offset the greenish or brownish
color in glass that results from
(1) iron impurities in the batch or
(2) iron or other impurities in the
pot or elsewhere in the production
process.
Daumenglas.
Germany,
17th century.
OH. 36.8 cm.
Depression glass: inexpensive, machine-pressed American
glassware made between about 1920 and 1950.
Devitrification: (1) The process whereby glass becomes
partly crystallized as it cools (usually too slowly) from
the molten state; (2) the crystals formed by this process.
Devitrification can also occur on the surface as a result
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