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1 537 005

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Application

4338294/04, 1987-12-07

(22)

Actual filing date

1987-12-07

(45)

Published

1994-10-15

(72)

Inventor

Shapiro B.I.Vakar A.G.Mikheeva L.I.Shpol'Skij M.R.Pinchuk A.M.Jurchenko V.G.Komjagina N.V.Khejnman A.S.Karaul'Shchikova R.V.Bondar' V.A.Sidorenko V.M.Zavatskij V.N.

METHOD OF PREPARING OF BROMOIODOSILVER PHOTOGRAPHIC EMULSION TO POURING ON Russian patent published in 1994 - IPC

Abstract SU 1537005 A1

FIELD: photographic materials. SUBSTANCE: emulsion with crystal diameter 0.85 mcm, pH 7; pAg 7.7, content of AgJ is 3 mole% containing 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene is used for pouring on. To the melt of this emulsion the following components are added successively: (8-9)·10-4M/M AgHal phenyl-di-(p-anisyl)phosphine, sensibilizing dye - 3,3-diethyl-9,11,9,11, -bic [β,β -dimethyltrimethylene]-thia- pentacarbocyanine iodide; derivative of C,N-diarylnitron - C-phenyl-N-phenylnitron at concentration (5-10)·10-3M/M AgHal or C-(o-chloro)phenyl-N-(p-tolyl)nitron at concentration (1-2,5)·10-3M/M AgHal and 2-heptyl-4-hydroxy-6-methyl-1,3,3a, 7-tetraazaindene at concentration (1-2)×·10-4M/M AgHal. Under these conditions photosensitivity is increased, optical fog density is decreased, degree of contrast of photomaterial is retained against 40; γ=1,8; Do=0,22-0,6,3 against 35). Method is used for preparing of infrachromatic materials for spectral analysis, defectoscopy, astrophysics. EFFECT: enhanced quality of emulsion. 1 tbl

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SU 1 537 005 A1

Authors

Shapiro B.I.

Vakar A.G.

Mikheeva L.I.

Shpol'Skij M.R.

Pinchuk A.M.

Jurchenko V.G.

Komjagina N.V.

Khejnman A.S.

Karaul'Shchikova R.V.

Bondar' V.A.

Sidorenko V.M.

Zavatskij V.N.

Dates

1994-10-15—Published

1987-12-07—Filed

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