Glass

Glass is a hard, brittle, translucent or transparent form of silicon dioxide doped with with other metallic oxides. Glass made from pure silicon dioxide is called fused quartz.

Types

• Lead
• Borosilicate
  • Corning 7740 (81% SiO₂, 2% Al₂O₃, 13% B₂O₅, 4% Na₂O)
• Soda-lime
• Fused Quartz

Form

Glass is a semi-liquid that hardens to a solid when it cools. It can be blown, cast, or manipulated into almost any shape while molten.

Measures

Molten glass is typically measured by oxide ratios, and then by weight or volume. Finished glassware is measured as the created object: a 1kg ingot or a two foot long quarter-inch tube.

See Also

Web

• glassian.org - An interesting site by a very nice chap named Ian Mackey.