Glass Glossary – C

When water vapour from the air comes into contact with cold surfaces, the vapour condenses on the cooler surface of the glass forming a foggy effect.

A transfer of heat by movement of air.

A narrow flat bar of lead, zinc or copper, which holds together the pieces of glass in copperlight glazing or leaded lights.

A term used to describe a void filled with sealant.

Clear Glass
Mostly composed of soda, lime and silica to obtain a very clear type of glass.

A substance formed from two or more elements chemically united in fixed proportions.

The transmission of heat through, along or from glass to another material in contact with it.

Recycled glass used in the manufacture of clear float glass.

A process in which glass is trimmed, also for decorative purposes.

Temperatures expressed with the Celsius scale are based on a division of one hundred degrees between the freezing point and boiling point of water.

Chemical Strengthening
A process in which glass is covered by a chemical solution thus producing a higher mechanical resistance.

Cold End
A term which describes operation performed on glass when it is already formed and cooled, such as cutting, grinding, acid etching, engraving, etc.

Stands for computer numerical control.

A thin layer or covering which changes the basic composition of glass.

The cavity formed by the spacer bar between the two panes of glass in double-glazed units. It is generally filled with air.

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