Photographic films
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsMasayoshi Mayama, Tohru Kobayashi, Masahide Tamura
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Abstract
A photographic film comprising a plastic support having first and second layers therein in that order, the first layer comprising a cellulose acetate together with a matting agent composed mainly of silicon dioxide of less than 1 .mu. in particle size, the second layer comprising a phosphoric acid ester, or an amine salt thereof of a C.sub.8 to C.sub.22 -higher alkyl alcohol. A light-sensitive emulsion layer is carried on the other side of the support.
Claims9
In a photographic film having a plastic support;
- a first layer comprising cellulose acetate and a matting agent comprising silicon dioxide less than 1.mu. in particle size;
- a second layer comprising a phosphoric acid ester of a C.sub.8 to C.sub.22 -higher alkyl alcohol, or an amine salt thereof, said first and second layers being carried in that order on one side of the support;
- and a light-sensitive emulsion layer on the other side of the support.
A photographic film which is stain-resistant to developing solutions containing an organic solvent, said film comprising a plastic support of cellulose triacetate or polyethylene terephthalate;
- a first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1.mu. in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate;
- a second layer comprising a phosphoric acid ester of a C.sub.8 to C.sub.22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, said first and second layers being carried in that order on one side of said support;
- and a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
A method of producing a photographic film which is stain-resistant to developing solutions containing an organic solvent, said method comprising forming a plastic support of cellulose triacetate or polyethylene terephthalate, depositing a first layer on one side of the support, said first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1.mu. in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate, depositing a second layer on the first layer, said second layer comprising a phosphoric acid ester of a C.sub.8 to C.sub.22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, and depositing a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
Dependencies are inferred from the claim text.