High chloride emulsion that contains a dopant and peptizer combi

Details High chloride emulsion that contains a dopant and peptizer combi High chloride emulsion that contains a dopant and peptizer combi

1996-10-30

1998-07-21

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430604, 430605, G03C 109, G03C 135

Patent

active

057833788

ABSTRACT:
A radiation-sensitive high chloride emulsion is disclosed comprised of grains predominantly bounded by {100} crystal faces and internally containing three dopants each selected to satisfy a different one of the following class requirements: (i) a metal coordination complex containing a nitrosyl or thionitrosyl ligand in combination with a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements, (ii) a shallow electron trapping dopant, and (iii) an iridium coordination complex having ligands each of which are more electropositive than a cyano ligand. A gelatino-peptizer for the grains is employed that contains less than 30 micromoles of methionine per gram. The dopants and peptizer in combination increase contrast and provide a highly unexpected increase in high density contrast.

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Research Disclosure, vol. 389, Sep., 1996, Item 38957, II, A.
Research Disclosure, Item 38957, I, D.

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