Photosensitive reproduction elements for forming negative tonabl

Details Photosensitive reproduction elements for forming negative tonabl Photosensitive reproduction elements for forming negative tonabl

1981-06-17

1982-11-09

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430291, 430913, 430919, 430920, 430921, G03C 168, G03C 1727

Patent

active

043585299

ABSTRACT:
A nonsilver photosensitive reproduction element which comprises a support bearing a layer of a photosensitive composition which comprises (1) at least one thermoplastic binder, (2) a photosensitive system consisting essentially of (a) a hexaarylbiimidazole compound and (b) a dihydropyridine compound; and optionally (3) a plasticizer, and (4) a thioamide, thiolactam or thiocarbanilic acid ester of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are as defined. The photosensitive element is useful in preparing negative tonable images.

REFERENCES:
patent: 3479185 (1969-11-01), Chambers
patent: 3615454 (1971-10-01), Cescon et al.
patent: 3652275 (1972-03-01), Baum et al.
patent: 4243741 (1981-01-01), Abele et al.
patent: 4271260 (1981-06-01), Abele et al.

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