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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Stangenglas
Glass Dictionary Term

(German, “pole glass”) A tall, narrow cylindrical drinking vessel (hence the name “pole glass”), usually with a pedestal foot. stangenglases stangenglass Tall Beaker (Stangenglas)

Stem
Glass Dictionary Term

The narrow part of a goblet or tazza that separates the bowl and the foot. stems Goblet

Stemware
Glass Dictionary Term

The collective name for drinking vessels and serving dishes with a stem supporting the bowl. stemwares stem-ware stem ware stem-wares stem wares 2 Wineglasses in "Persian" Pattern

Stick lighting
Glass Dictionary Term

The process of using a point to scratch internal details in painted or enameled decoration. stick lightings stick light stick-light stick lit stick-lit Stickwork stick-work stickworks stick worked stick-worked stick-works stickworking stick-working stick works

Soda
Glass Dictionary Term

Sodium carbonate. Soda (or alternatively potash) is commonly used as the alkali ingredient of glass. It serves as a flux to reduce the fusion point of the silica when the batch is melted. sodas

Soda-lime glass
Glass Dictionary Term

Historically, the most common form of glass. It contains three major compounds in varying proportions, but usually silica (about 60-75 percent), soda (12-18 percent), and lime (5-12 percent). Soda-lime glasses are relatively light, and upon heating, they remain plastic and workable over a wide

Soffietta
Glass Dictionary Term

(Italian) A tool used as a puffer to further inflate a vessel after it has been removed from the blowpipe and is attached to the pontil. It consists of a curved metal tube attached to a conical nozzle. The glassblower reheats the vessel, inserts the nozzle into its mouth so that the aperture is

Soft glass
Glass Dictionary Term

A generic name for glass (e.g., soda-lime glass) with a relatively high coefficient of expansion. The term hard glass (e.g., borosilicate glass) refers to glass with a relatively low coefficient of expansion. soft glasses soft-glass soft-glasses

Spechter
Glass Dictionary Term

(German) A drinking glass made in the Spessart region of Germany in the 16th century. Although the term is frequently applied to a tall glass resembling a Stangenglas, there is no proof that the usage is correct. spechters speckter speckters

Scyphus
Glass Dictionary Term

A cup with a foot and two opposed handles. scyphuses scyphi

Slumping
Glass Dictionary Term

The process of reheating a blank until it becomes soft and gradually flows under its own weight over or into a former mold and eventually assumes the shape of the mold. Soda-lime glass becomes soft at about 1110°F (600°C). Slumping is also known as sagging. slump slumped slumps sagged Sagging Dish

Smalt
Glass Dictionary Term

Colored glass, often deep blue glass colored with cobalt oxide. Smalts are finely ground to use as colorants for glass and enamel. smalts

Snake-thread decoration
Glass Dictionary Term

A type of decoration that consists of trails applied in sinuous patterns. It was made by the Romans between the second and fourth centuries A.D. snake-thread decorations snake-thread-decoration snake thread decoration snake thread decorations Goblet with Snake-Thread Decoration

Snuff bottle
Glass Dictionary Term

A small bottle (in China) or box (in Europe) for powdered tobacco, or snuff. The habit of inhaling snuff, which spread to Europe from the Americas in the 17th century, was introduced to China in the 18th century. snuff bottles snuff-bottle snuff-bottles snuffbox snuffboxes snuff box snuff boxes

Shearings
Glass Dictionary Term

Slivers of waste glass formed by trimming glassware during manufacture. sheerings clippings cuttings

Shears
Glass Dictionary Term

A tool used to trim excess hot glass from an object in the course of production. Many modern shears are embedded with chips of industrial diamonds. sheers

Shot glass
Glass Dictionary Term

A small drinking glass used to serve a single measure (shot) of liquor, usually whiskey. shot glasses shot-glass Tortoise Old-Fashioned

Sidonian glass
Glass Dictionary Term

A popular generic name for numerous first-century A.D. Roman mold-blown vessels. It is not known how many of these objects were actually made at Sidon, a city on the coast of Lebanon. Sidonian glasses Beaker

Silica
Glass Dictionary Term

Silicon dioxide, a mineral that is the main ingredient of glass. The most common form of silica used in glassmaking has always been sand. silicas

Silver stain
Glass Dictionary Term

A deep yellow stain made by painting the surface of the glass with silver nitrate or similar compounds and firing it at a relatively low temperature. silver stains silver stained silver-stained silver-stain Panel Depicting St. Michael Slaying Lucifer

Silvered glass
Glass Dictionary Term

A type of 19th-century glassware with an allover silver appearance, made by applying a solution of silver nitrate between the walls of a double-walled vessel. The solution was introduced through a hole in the base, which was then sealed to prevent the silver from oxidizing. Silvered glass is

Sintering
Glass Dictionary Term

The process of heating a mixture of materials so that they become a coherent mass, but not melting them. sinter sinterings cintering Frit

Size
Glass Dictionary Term

In glassworking, the name applied to several glutinous materials, such as glue and resin, used to affix color or gold leaf. sizes

Skyphos
Glass Dictionary Term

A cup with a foot and two opposed handles. skyphos skyphoses skyphi Skyphos

Schwarzlot
Glass Dictionary Term

(German, “black lead”) A sepia enamel first used in painting stained glass and later applied to glass vessels, either by itself or in combination with other enamels or gold. schwarzlots Schwarzlot Tumbler

Seal
Glass Dictionary Term

Its many meanings include an emblem impressed on wax or some other plastic substance as evidence of ownership or authenticity. Since the 17th century, many bottles have borne stamped glass seals that identify the producer of the contents, the tavern in which they were used, or the individual for

Seam mark
Glass Dictionary Term

A slight, narrow ridge on a glass object, which indicates that it has been made in a mold. The seams appear where gaps in the joins between parts of the mold have permitted molten glass to seep during formation. On well-made pieces, the seam marks are usually smoothed away by grinding or fire

Seeds
Glass Dictionary Term

Minute bubbles of gas, usually occurring in groups.

Service
Glass Dictionary Term

A matching set of tableware. services Tableware Set of 9 Blown Vessels

Scale
Glass Dictionary Term

An accidental inclusion in glass, consisting of corrosion products detached from the metal implements used to stir the batch or to form the object. scales

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