Photographic material comprising a magenta dye image forming cou

Details Photographic material comprising a magenta dye image forming cou Photographic material comprising a magenta dye image forming cou

1992-10-30

1996-09-03

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430554, 430555, G03C 108, G03C 726, G03C 732

Patent

active

055522661

ABSTRACT:
The combination of a magenta dye image-forming coupler, such as a phenylpyrazolone, with a substituted phenol in a photographic material provides an enhancement in the light stability of the resultant magenta image dye.
The phenol has the formula (I): ##STR1## wherein each R is the same or different and is an unsubstituted or substituted alkyl, halogen, cyano, SO.sub.2 R.sup.1, SO.sub.2 NHR.sup.1, NHSO.sub.2 R.sup.1 or COOR.sup.1 group, in which R.sup.1 is an unsubstituted or substituted alkyl or aryl group and n is from 1 to 5.
The phenol may totally or partially replace the conventional coupler solvent. The combination is useful in single colour or multi-colour photographic silver halide emulsion materials and processes.

REFERENCES:
patent: 4548899 (1985-10-01), Nakayama et al.
patent: 4562146 (1985-12-01), Masuda et al.
patent: 4581326 (1986-04-01), Katoh et al.
patent: 4853319 (1989-08-01), Krishnamurthy et al.
patent: 4942116 (1990-07-01), Renner
patent: 4965179 (1990-10-01), Kuwashima et al.
patent: 5126234 (1992-06-01), Naruse et al.
patent: 5376519 (1994-12-01), Merkel et al.

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