One equivalent couplers and low PKA release dyes

Details One equivalent couplers and low PKA release dyes One equivalent couplers and low PKA release dyes

1995-05-23

1997-03-18

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Two or more radiation-sensitive layers containing other than...

430543, 430559, 430955, 430958, 430226, G03C 146

Patent

active

056121733

ABSTRACT:
A photographic element containing a dye which when released from a coupler has a sufficiently low pKa, generally less than about 5, such that the dye remains substantially or fully ionized during coating of the film and in the produced film, results in an element containing a dye which has the desired hue without the use of additional additives, such as mordants, to keep the dye ionized. The dye is also useful in photographic elements without release from a coupler, for example, as a filter dye.

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patent: 5100759 (1992-03-01), Sato et al.
Patent Abstracts of Japan, 63 202 745 (Fuji), vol. 12:804, (1988).
C. E. Kohrt, Research Disclosure, "Thermal Silver-dye Bleach Element And Process", vol. 181:269-271 (1979).

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