Method for optimizing tabular grain population of silver halide photographic emulsions
AssigneeEastman Kodak Company
InventorMichael G. Antoniades
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Abstract
The invention provides a method of measuring to control silver halide grain formation during nucleation and ripening comprising combining a source of silver ions and a source of halide ions to form a suspension of nucleated particles, removing a portion of said suspension, measuring turbidity of said portion, determining floc size from the turbidity measurement, determining the difference between floc size and individual silver halide nuclei size.
Claims12
A method of measuring to control silver halide grain formation during nucleation and ripening comprising
- combining a source of silver ions and a source of halide ions to form a suspension of nucleated particles,
- removing a portion of said suspension,
- treating the removed portion with a defloculant to eliminate floculation, separate flocs into individual nuclei, and allow measurement of nuclei size,
- measuring turbidity of said portion,
- determining floc size from the turbidity measurement, and
- determining the difference between floc size and individual silver halide nuclei size, wherein said difference between floc size and nuclei size is greater than 20 nm to give a high population of tabular grains.
A method of measuring to control silver halide grain formation during nucleation and ripening comprising
- combining a source of silver ions and a source of halide ions to form a suspension of nucleated particles,
- removing a portion of said suspension,
- treating the removed portion with a defloculant to eliminate floculation, separate flocs into individual nuclei, and allow measurement of nuclei size,
- measuring turbidity of said portion,
- determining floc size from the turbidity measurement, and
- determining the difference between floc size and individual silver halide nuclei size, wherein said difference between floc size and nuclei size is greater than 100 nm to give a high population of tabular grains.
Dependencies are inferred from the claim text.