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1 730 932

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A1

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IPC

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Application

4851019/04, 1990-07-09

(22)

Actual filing date

1990-07-09

(45)

Published

1995-02-27

(72)

Inventor

Shapiro B.I.Mikheeva L.I.Vakar A.G.Al'Perovich M.A.Tolmachev A.I.Nesterenko Ju.A.Soguljaev Ju.A.

METHOD OF SPECTRAL SENSIBILIZATION OF BROMOIODOSILVER PHOTOGRAPHIC EMULSIONS Russian patent published in 1995 - IPC

Abstract SU 1730932 A1

FIELD: chemical-photography industry. SUBSTANCE: method involves addition of 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene, phenyl-di(p-anazyl)phosphine at concentration 1 x 1·10-3 M/M AgHal, sensibilizing dye - 3,3-diethyl-9,11,9′, 11′-bis-(β, β-dimethyltrimethylene)thiapentacarbocyanine iodide or 1,1′-diethyl-6, 6′-bis-(carbomethoxy)-13,15-trimethylene-14-methylquino-4, 4′-pentacarbocyanine iodide in melted bromoiodosilver emulsion of type "nucleus-envelope" containing AgJ (3 mol. % ). Compound of the formula where R - tert.-C4H9 or tert.-C8H17 is used as a supersensibilizing agent at concentration 5-10 x 5-10·10-3 M/M AgHal. Quantities of used supersensibilizing agents were decreased by 2-fold as compared with known one. Photographic properties of material were retained. EFFECT: improved ecology in photomaterial manufacture, retained photographic properties. 1 tbl

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SU 1 730 932 A1

Authors

Shapiro B.I.

Mikheeva L.I.

Vakar A.G.

Al'Perovich M.A.

Tolmachev A.I.

Nesterenko Ju.A.

Soguljaev Ju.A.

Dates

1995-02-27—Published

1990-07-09—Filed

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