Photographic method of making relief member with negative dye im

Details Photographic method of making relief member with negative dye im Photographic method of making relief member with negative dye im

1975-12-08

1978-12-26

Bowers, Jr., Charles L.

Gas separation: apparatus

Electric field separation apparatus

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

96 91R, 96 33, 96 36, 96 75, G03C 534, G03C 524, G03F 100

Patent

active

041314662

ABSTRACT:
A lithographic photographic material has a photosensitive layer comprising gelatin having an isoelectric point of at least 7 and a condensation product formed between a diazonium salt of a para-aminodipheynylamine derivative and an aldehyde. The photosensitive layer can be photoinsolubilized and will form a photo-relief.
A method for using the lithographic photographic material comprises partially photoinsolubilizing the photosensitive layer and then immersing it in a bath of an acid or direct dye to form level dying, washing the dye material with water to remove unexposed areas, thereby forming an image composed of the dye photoinsolubilized resin layer corresponding to the exposed areas.

REFERENCES:
patent: 2687958 (1954-08-01), Neugebauer
patent: 2937085 (1960-05-01), Seven et al.
patent: 3091529 (1961-11-01), Buskes
patent: 3407065 (1968-10-01), Chalkley
patent: 3598585 (1971-08-01), Gaspar
patent: 3679419 (1972-07-01), Gillich
patent: 3704125 (1972-11-01), Ketley et al.
patent: 3721557 (1973-03-01), Inoue
patent: 3756818 (1973-09-01), Hayakawa et al.
patent: 3829315 (1974-08-01), Schadlich et al.
patent: 3844787 (1974-10-01), Ulrich et al.

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