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Application

3776143/04, 1984-06-20

(22)

Actual filing date

1984-06-20

(45)

Published

1997-01-10

(72)

Inventor

Breslav Ju.A.Pejsakhov V.V.Andrejanov V.V.Berlin G.V.Myl'Tseva V.A.Loginov V.G.Egorova P.N.Shvartser O.N.Medyna N.M.Sokolovskaja I.N.

METHOD OF BROMO-IODO-SILVER PHOTOGRAPHIC EMULSION PREPARING Russian patent published in 1997 - IPC

Abstract SU 1210581 A1

FIELD: photoreagents. SUBSTANCE: method involves the controlled two-jet emulsifying by addition of potassium bromide and silver compound aqueous solutions to an aqueous-gelatin solution, emulsion washing off, chemical sensitization in the presence of sodium thiosulfate, potassium thiocyanate and gold perchlorate followed by spectral sensitization. Before emulsifying onset potassium iodide is added to an aqueous-gelatin solution at amount 0.15-15 g/l. Silver compound is silver ammoniate. Emulsifying is carried out at pBr = 1.6 $$$ 0.1 at the rate of potassium bromide and silver ammoniate addition 5-50 ml/min. After addition termination of the indicated solutions emulsion is kept at 45-55 C and pBr = 1.6 $$$ 0.1 for 30-60 min. The obtained emulsion exhibits flat microcrystals. EFFECT: increased resolution capability, simplified method.

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SU 1 210 581 A1

Authors

Breslav Ju.A.

Pejsakhov V.V.

Andrejanov V.V.

Berlin G.V.

Myl'Tseva V.A.

Loginov V.G.

Egorova P.N.

Shvartser O.N.

Medyna N.M.

Sokolovskaja I.N.

Dates

1997-01-10—Published

1984-06-20—Filed

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