Potash glass

Description

Common name for glass with a high potassium content. Potash glass has the approximate composition 80% SiO2, 0.6% Na2O, 7% CaO, 12% K2O and 0.4% Al2O3.

Synonyms and Related Terms

hard glass; Bohemia glass; alkali glass; forest glass; verre de fougère (Fr.); verre potassique (Fr.); kaliumglas (Ned.); vidro potássico (Port.); waldglas

Additional Information

S. Schur, "Conservation Terminology: A Review of Past & Current Nomenclature of Materials", Technology and Conservation, 1985.

Sources Checked for Data in Record

• G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 361

• Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985

• Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996