Timing layers and auxiliary neutralizing layer for color transfe

Details Timing layers and auxiliary neutralizing layer for color transfe Timing layers and auxiliary neutralizing layer for color transfe

1981-10-30

1982-10-26

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...

430212, 430216, 430223, 430454, 430531, 430536, 428500, 428507, 428515, 428532, G03C 140, G03C 110, G03C 700, G03C 524

Patent

active

043562493

ABSTRACT:
Photographic assemblages, elements, receiving elements and cover sheets comprise a combination of two timing layers and two neutralizing layers for use with negative-working silver halide emulsions and positive-working redox dye-releasers. The outermost timing layer has a negative temperature coefficient while the innermost timing layer has either a positive or negative temperature coefficient and has a penetration time by alkaline processing composition that is greater than the penetration time of the outermost timing layer. An auxiliary neutralizing layer is located between the two timing layers. Dye release is restricted more at low temperatures than at high temperatures so that the temperature latitude of the system is thereby increased.

REFERENCES:
patent: 3421893 (1969-01-01), Taylor
patent: 3455686 (1969-07-01), Farney et al.
patent: 4061496 (1977-12-01), Hannie et al.
patent: 4139379 (1979-02-01), Chasman et al.
patent: 4139389 (1979-02-01), Hinshaw et al.
patent: 4232107 (1980-11-01), Janssens
patent: 4314020 (1982-02-01), Reed et al.

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