Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1983-06-02
1984-08-28
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430241, 430375, 430445, 430446, 430405, 430497, 430542, 430559, 430564, 430566, 430611, 430621, 430623, 430955, 430958, G03C 140, G03C 554, G03C 110, G03C 700
Patent
active
044684517
ABSTRACT:
This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety comprising a 1,3-sulfur-nitrogen group, said 1,3-sulfur-nitrogen group (a) being capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex, and (b) possessing an amide substituent on the carbon atom in the 2-position that undergoes an intramolecularly accelerated cleavage reaction following the cleavage of said 1,3-sulfur-nitrogen group, which moiety maintains said precursor in its colorless form at least until the 1,3-sulfur-nitrogen group undergoes said cleavage. In a further embodiment, the cleavage of the amide substituent following the cleavage of the 1,3-sulfur-nitrogen group is used to provide an imagewise distribution of a photographically useful reagent, which reagent may be, for example, a photographically active reagent.
REFERENCES:
patent: 3443941 (1969-05-01), Rogers
patent: 3719489 (1973-03-01), Cieciuch et al.
patent: 4098783 (1978-07-01), Cieciuch et al.
patent: 4248962 (1981-02-01), Lau
patent: 4358525 (1982-11-01), Mooberry et al.
Campbell Sybil A.
Polaroid Corporation
Schilling Richard L.
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