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1 596 961

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Application

4444327/04, 1988-04-25

(22)

Actual filing date

1988-04-25

(45)

Published

1994-10-15

(72)

Inventor

Shapiro B.I.Vakar A.G.Mikheeva L.I.Slominskij Ju.L.Tolmachev A.I.Smirnova A.L.

METHOD OF SPECTRAL SENSIBILIZATION OF BROMINE-IODINE-SILVER PHOTOGRAPHIC EMULSIONS Russian patent published in 1994 - IPC

Abstract SU 1596961 A1

FIELD: photographic materials. SUBSTANCE: sensibilization is carried out by successive addition of sensibilizing dye of formula (concentration is (1.5-3) x ×10-6 mole/mole silver halide) and C,N-diphenyl- nitron to emulsion containing silver iodide 3 mol. % , particle diameter is d = 1 ± 0,05 , pBr value is 3.7-3.9 and pH 7 pH 7 ± 0,1] 0.1 taken in the form of melt of 2-p-heptyl-4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene or phenyl-di (p-anisyl)phosphine. Under these conditions photosensitivity S0,85 = 20-45 at wavelong spectrum region as compared 10-20 in the known case. EFFECT: enhanced photosensitivity of emulsion at the spectrum range 860-920 nm with maximum of sensibilization at 910-920 nm. 1 tbl

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SU 1 596 961 A1

Authors

Shapiro B.I.

Vakar A.G.

Mikheeva L.I.

Slominskij Ju.L.

Tolmachev A.I.

Smirnova A.L.

Dates

1994-10-15—Published

1988-04-25—Filed

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