Potash-lead glass

Description

Common name for glass having a high potassium and lead content. It has the approximate composition 45.5% SiO2, 1.7% Na2O, 0.5% CaO, 8.7% K2O, 43.5% PbO and 0.3% Al2O3. Potash-lead glass was also called 1) flint glass glass, 2) lead-potash glass and 3) crystal (Schur 1985).

Synonyms and Related Terms

potash lead glass; lead potash glass; lead potassium glass; flint glass; vidro de potssio e chumbo (Port.)

Additional Information

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

Authority

• Thomas Gregory, Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942

• Susan E. Schur, 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