Photographic silver halide element with gelatin layer containing silica
AssigneeAgfa-Gevaert
InventorsFritz Nittel, Heinz-Gunther Auweiler, Manfred Peters, Hartmut Randolph
Life of this patent
Estimating the term…
Abstract
The adhesion of photographic layers to a film base that either has, on one or both sides, a surface consisting of a polyolefin layer that has been treated with a corona discharge, or consists of a polyester film provided with a (first) substrate layer is improved by an adhesive layer that is applied in the form of an oil-in-water emulsion consisting of 50 to 60 wt % of oil-formers and 40 to 50 wt % of a solid consisting of 50 to 80 wt % gelatin and 20 to 50 wt % colloidal SiO.sub.2 together with the following layers to the surface of the film base.
Claims5
Photographic material that contains, disposed on a film base, a coating with at least one light-sensitive silver halide emulsion layer and optionally further light-sensitive and/or non-light-sensitive binder layers, wherein the film base
- either has, on one or both sides, a surface consisting of a polyolefin layer that has been treated with a corona discharge,
- or consists of a polyester film provided with a (first) substrate layer,
- characterized in that there is disposed on the surface of the film base facing the coating and consisting of the polyolefin layer or the first substrate layer a substratum adhesive layer consisting of
- 50 to 60 wt % of high-boiling water-insoluble organic compounds (oil-formers) and
- 40 to 50 wt % of a solid consisting of
- 50 to 80 wt % gelatin and
- 20 to 50 wt % colloidal SiO.sub.2.
Dependencies are inferred from the claim text.