Non-uniform iodide high chloride {100} tabular grain emulsion

Details Non-uniform iodide high chloride {100} tabular grain emulsion Non-uniform iodide high chloride {100} tabular grain emulsion

1997-10-21

1999-05-25

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

G03C 1035

Patent

active

059069139

ABSTRACT:
A high chloride {100} tabular grain emulsion is disclosed containing a non-uniform distribution of iodide to increase sensitivity. A high percentage of the {100} tabular grains have one or more crystal lattice dislocations lines at sites of maximum iodide concentration. The dislocation lines are distinctive in that they are oriented parallel to at least one edge of the {100} tabular grains. The mechanism for producing the dislocation lines relies upon a relatively slow rate of addition of iodide ion, improving the reproducibility of emulsion properties in manufacture. Relatively low overall levels of iodide are employed, allowing rapid rates of development.

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