Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1993-04-21
1994-05-31
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430212, 430218, 430215, 430220, 430551, G03C 554
Patent
active
053168887
ABSTRACT:
Disclosed is a color diffusion transfer photographic film unit improved in separability and light fastness. It comprises (1) a light sensitive sheet having an image receiving layer, a white reflective layer, a shading layer and at least one silver halide emulsion layer having at least one dye image forming substance, which layers are formed on a transparent support, (2) a transparent cover sheet comprising a neutralization layer and a neutralization timing layer, which layers are formed on a transparent support, and (3) a shading alkali treating composition developed between the light sensitive sheet and the transparent cover sheet. Further, the image receiving layer contains a hydrazine derivative represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represent a substituted or unsubstituted alkyl, cycloalkyl, alkenyl or aralkyl group and may combine with one another to form a ring, provided that this ring is a non-aromatic heterocyclic group and that all atoms belonging to R.sub.1, R.sub.2, R.sub.3 and R.sub.4 and constituting the ring are carbon atoms.
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patent: 5190853 (1993-03-01), Seto et al.
patent: 5254433 (1993-10-01), Nakamura et al.
"Photographic Processes and Products" Research Disclosure No. 15162, Nov. 1976, pp. 76-87.
"Color of Diffusion Transfer Photographic Material", Research Disclosure No. 16741, Mar. 1979, pp. 32 and 33.
Naruse Hiedaki
Tsukahara Jiro
Bowers Jr. Charles L.
Fuji Photo Film Co. , Ltd.
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