Direct positive photo-sensitive materials

Details Direct positive photo-sensitive materials Direct positive photo-sensitive materials

1987-02-19

1989-08-15

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Two or more radiation-sensitive layers containing other than...

430567, 430589, 430598, G03C 119, G03C 1485

Patent

active

048574457

ABSTRACT:
A direct positive photo-sensitive material is described, wherein the material comprises at least one internal latent image-type silver halide emulsion layer containing core/shell-type silver halide grains consisting of substantially cubic or tetradecahedral grains mainly of the face (100) and being spectrally-sensitized with at least one sensitizing dye having the following formula: ##STR1## wherein R.sup.1 and R.sup.2 represent each a lower alkyl group substituted with a sulfonato, carboxyl or hydroxyl group, at least one of R.sup.1 and R.sup.2 being a sulfonatoalkyl group, R.sup.3 represents a hydrogen atom or a lower alkyl or substituted or unsubstituted phenethyl group, R.sup.4 represents a chlorine atom, a methoxy or ethoxy group or a hydrogen atom, R.sup.5 represents a chlorine atom or a phenyl, alkoxy or alkyl group, M.sup.+1 represents a cationic residue, m represents 0 or 1 with the proviso that when an inner salt is formed, m is 0.

REFERENCES:
patent: 3761276 (1973-09-01), Evans
patent: 4471044 (1984-09-01), Parton et al.
patent: 4478928 (1984-10-01), Hess et al.
patent: 4571380 (1986-02-01), Noguchi et al.
patent: 4582779 (1986-04-01), Kubota et al.

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