Radiation imagery chemistry: process – composition – or product th – Color imaging process – Laser or radiation exposure other than visible light
Patent
1996-10-30
1998-07-21
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Laser or radiation exposure other than visible light
430604, 430605, 430567, G03C 109, G03C 1035
Patent
active
057833737
ABSTRACT:
An electronic printing method is disclosed which comprises subjecting a radiation sensitive silver halide emulsion layer of a recording element to actinic radiation of at least 10.sup.-4 ergs/cm.sup.2 for up to 100.mu. seconds duration in a pixel-by-pixel mode. The silver halide emulsion layer is 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) a 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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Bell Eric L.
Budz Jerzy A.
Mydlarz Jerzy Z.
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
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