Novel microfilm and process for preparation

Details Novel microfilm and process for preparation Novel microfilm and process for preparation

1976-05-07

1977-10-25

Welsh, John D.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 68, 96 87R, 96115R, G03C 171

Patent

active

040554244

ABSTRACT:
Microfilm structures of improved contrast are provided by coating a suitable transparent film substrate with an intermediate layer of a silicone elastomer which is abhesive to ink, coating said silicone with a surface layer of a photosensitive polymer which when exposed to activating electromagnetic radiation cross-links and chemically attaches to said silicone elastomer to form oleophilic ink accepting image areas, imagewise exposing said photosensitive polymer, removing the non-exposed, light sensitive polymer to form non-imaged areas of the abhesive silicone elastomer, and selectively inking the oleophilic image areas to form an imaged microfilm structure of improved image density and contrast.

REFERENCES:
patent: 3157505 (1964-11-01), Notley
patent: 3615435 (1971-10-01), Chu et al.
patent: 3865588 (1975-02-01), Ohto et al.
patent: 3886865 (1975-06-01), Ohto et al.

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