Process for preparing narrow size distribution small tabular gra

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

430567, G03C 1015

Patent

active

052544532

ABSTRACT:
The invention is generally accomplished by a method of forming a silver halide emulsion in which digestion of nucleated silver halide grains is carried out in a halide solvent concentration of between about 0.0015 and about 0.015 normal. In a preferred embodiment the solvent utilized is ammonium hydroxide and grains of a thickness of between about 0.05 and 0.5 micron having an equivalent circular diameter of about 0.05 to about 2.0 microns are produced. It is also preferred that the grains be nucleated in a bromide solution having a bromide ion concentration of between 0.0075 and about 0.6 normal.

REFERENCES:
patent: 4063951 (1977-12-01), Bogg
patent: 4067739 (1978-01-01), Lewis
patent: 4150994 (1979-04-01), Maternaghan
patent: 4431729 (1984-02-01), Falxa
patent: 4477565 (1984-10-01), Himmelwright
patent: 4722886 (1988-02-01), Nottorf
patent: 4801522 (1989-01-01), Ellis
patent: 5013641 (1991-05-01), Buntaine et al.
patent: 5087555 (1992-02-01), Saitou
patent: 5096806 (1992-03-01), Nakamura et al.
Carroll et al, Research Paper No. 376, "The Photographic Emulsion the Silver Ion Gelatin Equilibrium", p. 821.
Markocki et al, Photographic Science and Engineering, vol. 17, No. 3, 1973.
Scott, The British Journal of Photography, Feb. 25, 1983, p. 211.
Duffin, Photographic Emulsion Chemistry, 1966, p. 72.
Photographic Chemistry, vol. 1, 1957, p. 331.
Neblette, Photography Its Materials and Processes, p. 120.
Carroll et al, Introduction to Photographic Theory, 1980, p. 124.
Abstract of German Patent 2422320, Nov. 1975.
Abstract of German Patent 2932185, Feb. 1980.
Abstract of Japanese Patent 63-26651, Feb. 1988.
Abstract of Japanese Patent 61-23148, Jan. 1986.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for preparing narrow size distribution small tabular gra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing narrow size distribution small tabular gra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing narrow size distribution small tabular gra will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1350840

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.