Masked development/image modifier compounds of silver photograph

Details Masked development/image modifier compounds of silver photograph Masked development/image modifier compounds of silver photograph

1980-07-25

1982-08-10

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

430370, 430428, 430445, 430446, 430448, 430543, 430559, 430570, 430607, 430611, 430614, 430955, 430958, G03C 526, G03C 102

Patent

active

043438938

ABSTRACT:
Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

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patent: 3639417 (1972-02-01), Porter et al.
patent: 3698898 (1972-10-01), Grasshoff et al.
patent: 3877941 (1975-04-01), Lohmann
patent: 4063950 (1977-12-01), Fujiwhara et al.
patent: 4187110 (1980-02-01), Yagihara et al.
patent: 4245033 (1981-01-01), Eida et al.

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