Radiation imagery chemistry: process – composition – or product th – Combined
Patent
1995-04-12
1997-08-05
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Combined
134 64P, 134 40, G03C 500, G03C 544
Patent
active
056541295
ABSTRACT:
Trans-dichloroethylene is used in a pure or in a blended state as a cleaning agent for all acetate-based photographic films. In manual cleaning procedures of still-photography and motion-picture films, a soft, lint-free material is moistened with trans-dichloroethylene, or a blend containing trans-dichloroethylene, and then used to buff the film. The most favorable blend discovered contains 50% trans-dichloroethylene, 50% perchloroethylene. In mechanized cleaning procedures of motion-picture films, it is anticipated that trans-dichloroethylene, or a blend containing trans-dichloroethylene, can be used as the cleaning agent with little or no modification to the existing machines. Trans-dichloroethylene can serve as an effective, non-ozone depleting replacement for 1,1,1-trichloroethane in all film-cleaning applications.
REFERENCES:
patent: 3615814 (1971-10-01), Ott et al.
patent: 3635762 (1972-01-01), Ott et al.
patent: 3737941 (1973-06-01), Miller et al.
patent: 3882568 (1975-05-01), Hill
patent: 4086179 (1978-04-01), Schneider
patent: 5250208 (1993-10-01), Merchant et al.
Letscher Geraldine
Pugh C. Emmett
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