Back to results
US 4,061,497 AGranted
Catalytic activation of cobalt complex imaging by cobalt
AssigneeEastman Kodak Company
InventorsGlenn R. Wilkes, Albert T. Brault
Life of this patent
Estimating the term…
Abstract
An imaging system and process wherein an element comprising a cobalt complex-developer redox system is catalyzed by cobalt sulfide. The cobalt sulfide can be imagewise produced by exposing a photoreducible cobalt complex in the presence of a thioamide, or it can be uniformly distributed and either masked in an imagewise fashion, or reacted with imagewise distributed color developing agent.
Claims11
An image-recording element comprising
- a support, and
- at least oneimage-providing layer on said support,
- said layer comprising
- a. means for forming CoS in said layer, said means including a source of sulfide ions in an amount of at least about 2.5 .times. 10.sup.-5 moles of sulfide ions dm.sup.2 and a reducible cobalt(III)complex;
- and
- b. a color coupler capable of forming a dye by reaction with an oxidized primary aromatic amine color developing agent.
3 more elements
An image forming composition comprising
- a. means for forming CoS, said means including ions in an amount, which when coated on a support provides at
- least about 2.5 .times. 10.sup.-5 moles of sulfide ions/dm.sup.2 ;
- b. a color coupler capable of forming a dye by reaction with an oxidized primary aromatic amine color developing agent;
- and
- e. a reducible cobalt(III)complex.
2 more elements
An image-recording element comprising
- a support, and
- at least one image-providing layer on said support,
- said layer comprising
- a. means for forming CoS in said layer, said means including a source of sulfide ions, said source being capable of reacting with cobalt(II) and being present in an amount of at least about 2.5 .times. 10.sup.-5 moles of sulfuide ions/dm.sup.2 ;
- and
- b. a color coupler capable of forming a dye by reaction with an oxidized primary aromatic amine color developing agent, said layer being essentially free of a light-sensitive composition,
- and in at least one other layer, a silver halide catalyst capable of photo-initiating a reaction between a reducibel and an oxidizable primary aromatic amine color developing agent.
4 more elements
Dependencies are inferred from the claim text.