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US 6,187,518 B1Granted
Backing layers with reduced scum formation for photographic films
AssigneeEastman Kodak Company
InventorsRaymond T. Jones, Ravi Sharma, Alfred B. Fant
Life of this patent
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Abstract
The present invention is a photographic element which includes a support, at least one silver halide emulsion superposed on a front side of the support and an outermost backing layer superposed on a backside of the support. The outermost backing layer is composed of a hydrophobic binder and a hydrophilic binder wherein the backing layer has an advancing water contact angle of 70 or greater and a receding water contact angle of at least 40 less than the advancing water contact angle.
Claims21
A photographic element comprising:
- a support having a front side and a backside;
- at least one silver halide emulsion superposed on the front side of said support;
- and
- an outermost backing layer superposed on the backside of said support comprising at least one hydrophobic binder blended with at least one hydrophilic binder, wherein the outermost backing layer has an advancing water contact angle of 70 or greater and a receding water contact angle of at least 40 less than the advancing water contact angle, and wherein at least one hydrophilic binder is selected from the group consisting of polymers containing quaternary ammonium salts and polyelectrolyte polymers.
1 more element
A photographic element comprising:
- a support having a front side and a backside;
- at least one silver halide emulsion superposed on the front side of said support;
- and
- an outermost backing layer superposed on the backside of said support comprising at least one hydrophobic binder blended with at least one hydrophilic binder that is not gelatin, wherein the outermost backing layer has an advancing water contact angle of 70 or greater and a receding water contact angle of at least 40 less than the advancing water contact angle.
1 more element
Dependencies are inferred from the claim text.