Photographic silver complex diffusion transfer reversal process

Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...

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Details

430204, 430230, 430583, G03C 554, G03C 116

Patent

active

046861700

ABSTRACT:
Photographic silver complex diffusion transfer reversal process wherein the photographic material is spectrally sensitized with a dye corresponding to the general formula of the description, wherein said dye provides to the silver halide emulsion layer a spectral sensitivity mainly in the range of 400 to 500 nm and does not extends its spectral sensitivity substantially beyond 500 nm, and wherein the handling (exposure, development and diffusion transfer) of the photographic material during said steps is effected in yellow safelight corresponding to the light transmitted by a specified cut-off filter without causing fog.

REFERENCES:
patent: 4242436 (1980-12-01), Mertens et al.
patent: 4250244 (1981-02-01), Borror et al.
patent: 4563410 (1986-01-01), De Jaeger et al.

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