All About Glass

All About Glass

This is your resource for exploring various topics in glass: delve deeper with this collection of articles, multimedia, and virtual books all about glass. Content is frequently added to the area, so check back for new items. If you have a topic you'd like to see covered, send us your suggestion. If you have a specific question, Ask a Glass Question at our Rakow Research Library.

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Fining
Glass Dictionary Term

The physical and chemical process of eliminating bubbles from the melt by raising the temperature to make the glass more fluid and adding fining agents such as arsenic and antimony.

Firing
Glass Dictionary Term

The process of (1) heating the batch in order to fuse it into glass by exposing it to the required temperature in a crucible or pot, (2) reheating unfinished glassware while it is being worked, or (3) reheating glassware in a muffle to fuse enamel or gilding. The melting of the batch may require a

Founding
Glass Dictionary Term

The initial phase of melting batch. For many modern glasses, the materials must be heated to a temperature of about 2450°F (1400°C). This is followed by a maturing period, during which the molten glass cools to a working temperature of about 2000°F (1100°C).

Hard glass
Glass Dictionary Term

A generic name for glass (e.g., borosilicate glass) with a relatively low coefficient of expansion. Soft glass (e.g., soda-lime glass), by contrast, has a relatively high coefficient of expansion.

Hofkellereiglas
Glass Dictionary Term

(German, “court wine-cellar glass”) A drinking glass used in the buttery of a German court.

Intercalaire
Glass Dictionary Term

(French, “inserted”) The process of applying two layers of decoration, the first being covered with a skin of glass that serves as the surface for the second.

Kiln wash
Glass Dictionary Term

A refractory powder that can be mixed with water and applied to shelves in a kiln or to mandrels to prevent glass or glaze from sticking to them. This is also known as bat wash.

Lagynos
Glass Dictionary Term

(from Greek) A pitcher with a tall, narrow neck and a wide body.

Laub-und Bandelwerk
Glass Dictionary Term

A type of interlaced ornament consisting of foliage and strapwork, popular in Germany and Bohemia in the 18th century.

Layered glass
Glass Dictionary Term

Glass containing layers of different colors. Decorative effects can be obtained by revealing the contrasting colors by acid etching, carving, cutting, or engraving.

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