METHOD OF PREPARING INFRACHROMATIC PHOTOGRAPHIC MATERIAL Russian patent published in 2007 - IPC G03C1/08 

Abstract SU 1840622 A1

FIELD: light-sensitive materials.

SUBSTANCE: invention provides a method of preparing infrachromatic photographic material for use in photochemical industry to record information under low heat field illumination conditions and in telephotography. Method consists in coating underlayered substrate of silver bromide-iodide gelatin emulsion with protective layer composition based on gelatin and silver nitrate followed by drying of layers, said silver bromide-iodide gelatin emulsion being supplemented with 15-30% (on the weight of dry gelatin) of latex based on polymer compound: (i) butyl acrylate/diacetoneacrylamide/styrene/methacrylic acid copolymer at monomer ratio 60:30:4:6 or (ii) butyl acrylate/styrene/methacrylic acid copolymer at monomer ratio 7:0.5:0.5, or (iii) butyl acrylate/hydroxy-3-chloropropyl methacrylate at monomer ratio 7:2. Furthermore, protective layer composition can further be supplemented with latex based on butyl acrylate/styrene/methacrylic acid copolymer at monomer ratio 19:0.5:0.5 in amount 5-12% of the weight of dry gelatin.

EFFECT: increased sensibility of photographic material for emission within a wavelength range of 650-950 nm and prolonged warranty storage period.

2 cl, 1 tbl, 10 ex

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SU 1 840 622 A1

Authors

Belikov Aleksandr Dmitrievich

Makarenko Irina Vadimovna

Ganina Valentina Ivanovna

Moshkina Tamara Mikhajlovna

Karnitskaja Rimma Il'Inichna

Blinova Sanija Maksutovna

Dates

2007-09-10Published

1989-02-16Filed