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GLOSSARY OF TERMS
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S:
Safety Glass
Flat or bent glass that is heat treated or laminated, and if broken would not cause serious injury.
Score
To penetrate the surface of glass with a cutting device, such as a glass cutter.
Scratch-Resistant Coating
Coating applied to glass surfaces to reduce scratching effects.
Scratches
Any marking or tearing of the glass surface.
Sealed Insulating Glass Units
(Same as "Insulating Glass Unit")
Seam
To grind or sand the sharp edges of a piece of glass, usually with a belt or wheel.
Seeds
Small bubbles in float glass, less than 1/32" in diameter.
Shadowgraph
A devise used for inspecting glass for distortion or other defects.
Sharks Teeth
A term used to identify the appearance of the cut edge of glass.
Sheet Glass
Flat glass made by continuous drawing in the vertical direction.
Shore "A" Hardness
Measurement of hardness by means of a Durometer Hardness Gauge.
Silvering Process
The process of appling silver to the back of mirrors.
Sizing Glass
To cut a piece of glass to a specific size.
Skylight
A glass or plastic window, usually installed on a roof of a building.
Smoke
Streaked areas in glass appearing with slight discoloration.
Soda
Sodium oxide. A carbonate of sodium.
Soda Lime Glass
An abbreviation for soda-lime-silicate glass.
Soda-Lime-Silicate Glass
Glass compositions in the most common flat glass made today.
Solar Control Glass
Tinted or coated glass that reduces solar heat gain through a glazed product.
Spandrel
Panel of a wall located between vision areas which conceal structural columns, floors and walls.
Stain
Discoloratin of glass.
Stones
Crystalline inclusion imbedded in the glass.
Storm Window
A glass panel placed on the outside of an existing window as an extra protection from the elements.
Strain Pattern
A specific iridscent pattern or darkish shadow that appears under certain polarized lighting conditions, also known quench marks. The stress pattern is caused by localized stresses from the rapid air cooling on a tempering operation, such as heat-treated glass.
Strength
A term to indicate relative thickness in flat glass.
Strength, Double
Flat glass between 0.115 and 0.134 in. thick.
Strength, Single
Flat glass between 0.085 and 0.101 in. thick.
Stress (Residual)
Any tension or compression existing in the glass, usually as a result of incomplete annealing.
String
An imperfection in glass resulting from a large grain of sand or foreign material.
Suction Process
A process in which glass is transported or installed by vacuum.
Surface Compression
Surface stresses in heat-treated glass, resulting from rapid cooling of glass surface to produce compresssive stresses at the surface.
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