Continuous in-line preparation of photographic gelatin solutions
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert R. Schultz
Life of this patent
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Abstract
A process for the in-line preparation of gelatin solutions comprising (a) mixing gelatin particles with an aqueous solution to wet the gelatin forming a gelatin-aqueous solution mixture, (b) heating rapidly said mixture to a temperature capable of digesting gelatin in said mixture, and (c) maintaining the digested gelatin at said temperature for a period to dissolve the gelatin particles into the aqueous solution. The process provides gelatin solutions for photographic uses in an improved manner without the general dissolution problems. The process is quick and is accomplished in-line, preferably continuously.
Claims18
A process for the in-line preparation of gelatin solutions comprising
- (a) mixing gelatin particles with an aqueous solution to wet the gelatin to form a gelatin-aqueous solution mixture containing 0.1 to 50 percent by weight gelatin.
- (b) heating rapidly the gelatin-aqueous solution mixture to a heating means and heating the gelatin-aqueous solution mixture to a temperature capable of digesting the gelatin in the mixture. and
- (c) maintaining the digesting gelatin for a period sufficient to dissolve the gelatin particles into the aqueous solution, wherein heating step (b) and maintaining step (c) occur in less than about 25 minutes.
Dependencies are inferred from the claim text.