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Potash-lime glass

Glass Dictionary

A form of glass containing three major compounds in varying proportions: silica (usually about 60-75 percent), potash (12-18 percent), and lime (5-12 percent). Forest glass is a common type of potassium-lime glass. Potash glass is slightly denser than soda-lime glass; it passes from the molten to the rigid state more quickly, and it is therefore more difficult to manipulate into elaborate forms. However, it is harder and more brilliant, and it lends itself to decorative techniques such as facet cutting and copperwheel engraving.

Alternate Spellings: 
potash-lime glasses
potash lime glass
potash lime glasses
Potassium-lime glass
Potassium lime glass
Potassium-lime glasses
Potassium lime glasses