Diazo copying material for secondary original

Details Diazo copying material for secondary original Diazo copying material for secondary original

1977-05-04

1978-10-10

Herbert, Jr., Thomas J.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 91R, 961145, 427146, 427150, 427261, 428207, 428325, 428331, 428913, G03C 138, G03C 152

Patent

active

041194659

ABSTRACT:
A method of manufacturing a diazo copying material for use in preparing a secondary original, which comprises coating a water-dispersible precoating liquid comprising a porous powder, a binding agent and an anionic surface active agent having the following general formula on a transparent or translucent support and drying thereafter, and subsequently coating a photosensitive liquid consisting essentially of a photosensitive diazonium salt on the precoated surface of said support and drying thereafter.
General formula: ##STR1## [wherein m represents Na or K, and R represents alkyl radical having 1 - 20 carbon atoms]

REFERENCES:
patent: 3948663 (1976-04-01), Shiba et al.
patent: 3950171 (1976-04-01), Nihyakumen et al.
patent: 3963499 (1976-06-01), Shiba et al.
patent: 4020261 (1977-04-01), Oda et al.

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