Photographic products employing nondiffusible 4-arylazo-1-hydrox

Details Photographic products employing nondiffusible 4-arylazo-1-hydrox Photographic products employing nondiffusible 4-arylazo-1-hydrox

1985-05-13

1987-01-06

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...

430222, 430562, G03C 140, G03C 554

Patent

active

046346546

ABSTRACT:
Photographic elements and assemblages are described which employ nondiffusible 4-arylazo-1-hydroxy-2-carboxy ester substituted naphthoic image dye-providing compounds capable of releasing diffusible dye moieties which undergo substantial hue shifts at low, or acidic, pH values but which provide desired hues at neutral or basic pH values used for viewing or processing.

REFERENCES:
patent: 3929760 (1975-12-01), Landholm et al.
patent: 3954476 (1976-05-01), Krutak, Sr. et al.
patent: 4246414 (1981-01-01), Fujita et al.
patent: 4250246 (1981-02-01), Itoh et al.
patent: 4255509 (1981-03-01), Ono et al.
patent: 4268624 (1981-05-01), Fujita et al.
patent: 4560645 (1985-12-01), Toriuchi et al.

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