Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1998-10-09
2000-07-04
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430567, 430642, 430604, 430605, G03C 1015, G03C 1047, G03C 108
Patent
active
060836784
ABSTRACT:
A method has been described for preparing a light-sensitive silver halide photographic emulsion comprising performing at least three distinct precipitation steps in an aqueous medium into a reaction vessel, followed by desalting by means of flocculation and washing or by means of ultrafiltration, said emulsion comprising a colloidally stabilizing binder and {100} tabular silver halide grains containing at least 50 mole % of silver chloride, wherein at least 60% by number of all grains is provided by said tabular grains, and wherein said tabular grains exhibit an average aspect ratio of at least 2, an average thickness of at most 0.25 .mu.m with a variation coefficient of at most 0.25, and an average equivalent circular crystal diameter of 0.3 .mu.m or more with a variation coefficient of at most 0.20;
REFERENCES:
patent: 5527664 (1996-06-01), Kikuchi et al.
patent: 5707793 (1998-01-01), Oyamada
patent: 5885763 (1999-03-01), Verrept et al.
Derwent--XP002071828 & JP 09 005 911 (Fuji Photo Film Co Ltd) Jan. 10, 1997 & US 5,707,793 A, Jan. 13, 1998.
Cuypers Jan
Verrept Peter
Agfa-Gevaert N.V.
Huff Mark F.
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