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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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

Scarab
Glass Dictionary Term

(from Latin scarabaeus, “beetle”) (1) A beetle, usually the scarabaeid beetle, which was revered by the ancient Egyptians; hence (2) a gem in the form of a beetle, with a design in intaglio on the flat underside. scarabs

Scavo
Glass Dictionary Term

(Italian, “excavation”) A technique involving the application, to the surface of an object, of substances that, when heated to about 1470°F (800°C), fuse and create an effect similar to weathering, thereby imitating glass from an archeological excavation.

Scheuer
Glass Dictionary Term

(German) A type of drinking glass with a short cylindrical neck, a hemispherical body, and a single handle that projects outward and upward from the wall. scheuers schuer schuers

Schmelzglas
Glass Dictionary Term

(German, “enamel glass”) A term applied to several types of decorative glassware, including calcedonio and opaque white glass with a red overlay applied by flashing. It does not refer to glass decorated with enamel. schmelzglases schmelzglass schmelz glass

Römer
Glass Dictionary Term

A drinking vessel for wine or beer. It has an ovoid mouth, a cylindrical body, and a conical foot. The body is usually decorated with prunts. romer romers roemers roemer Roemer with a Hunting Scene

Rotary polishing
Glass Dictionary Term

The process of polishing an object with tools and an abrasive while turning it on a lathe. rotary-polishing rotary-polish rotary polish rotary polished rotary-polished

Rummer
Glass Dictionary Term

A type of 19th-century English goblet, with a short stem and a square or domed foot. rummers rumer rumers Rummer

Salt
Glass Dictionary Term

(from French salière, “salt dish”) A small bowl used at the table for salt. salts saltcellar saltcellars salt cellar salt cellars salt-cellar saltceller Green Salt Dish

Salver
Glass Dictionary Term

A tray for serving. At first, salvers were used primarily for presenting objects to rulers. More recently, the word is used to denote trays used for presenting letters or visiting cards, or for serving refreshments. salvers Salver Pressed in "Sharp Diamond" Pattern

Sand
Glass Dictionary Term

The most common form of silica used in making glass. It is collected from the seashore or, preferably, from deposits that have fewer impurities. For most present-day glassmaking, sand must have a low iron content. Before being used in a batch, it is thoroughly washed, heated to remove carbonaceous

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