Heavy flint 64 a new glass type for spectacle production

Catalogue Number: 2082
Heavy flint 64 a new glass type for spectacle production
Category: Memorabilia and ephemera
Sub-Category: Advertising, trade and products
Year Of Publication/Manufacture: 1974
Time Period: 1940 to 1999
Place Of Publication/Manufacture: Oberkocken, Germany
Publisher/Manufacturer: Carl Zeiss
Description Of Item: Booklet, 7 pages plus 11 pages of illustrations, booklet opens to show pages of text to the left and the illustrations to the right. The material was presented as a lecture at the WVAO congress in Baden-Baden 1975. Also filed with this booklet is a A4 promotional card for ASL Spectralite high index Semi-finished lenses SOLA OPTICAL 1995
Historical Significance: The text claims that heavy flint or SF 64 is a new type of glass with special properties. It discusses how those properties effect thickness, weight, appearance and optical properties. It also discusses how the material should be processed.
How Acquired: Donated by Elizabeth Hatfield, member of the College
Date Acquired: August 2012
Condition: Mint
Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 5

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