Back to results
US 6,187,526 B1Granted
Method to prevent the growth of micro-organisms in photographic dispersions
AssigneeEastman Kodak Company
InventorsChristian Paris, Laurent G. Fernandez-Puente
Life of this patent
Estimating the term…
Abstract
The invention relates to the preparation of photographic dispersions. The method of the invention consists in preparing a fluid dispersion of an additive in a colloid, congealing the resulting dispersion, subdividing the resulting congealed dispersion into particles, washing the resulting particles, and adding to them a solution of biocide. A dispersion is thus obtained that is protected against the proliferation of micro-organisms during storage.
Claims7
A method of preparing a photographic dispersion, said method comprising the steps of:
- (1) forming of a fluid dispersion containing a hydrophilic colloid, a photographic reagent, a high-boiling solvent and an auxiliary solvent;
- (2) chilling, divising and washing the dispersion;
- and
- (3) Adding to the chilled and washed dispersion an aqueous solution of at least one biocide.
1 more element
Dependencies are inferred from the claim text.