Society of Glass Technology · [Sheffield] · leaf 548
re of gelatine, sugar, tartaric acid, and a littlenitrate of soda. In case of fire, the organic layer is carbonisedand the sheet thus acts as a screen to protect materials from damageby radiated heat which would pass through a sheet of ordinarywire glass. G. D. 211. Process of Forming Lens Blanks.… … ns:
Glass
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