PROCESS OF MANUFACTURE OF HALOGEN-SILVER PHOTOGRAPHIC EMULSION Russian patent published in 1995 - IPC

Abstract RU 2047207 C1

FIELD: photographic industry. SUBSTANCE: process of manufacture of halogen-silver photographic emulsion by two-jet injection of solutions of silver nitrate and potassium bromide into water-and-gelatin solution involves production of flat microcrystals of silver bromide with physical maturing of emulsion, growth of lateral shells of silver bromine-iodide on to flat microcrystals, precipitation of solid phase, washing of sediment, dispersion of sediment in water-and-gelatin solution, chemical sensitization prior to which start emulsion is injected with potassium triocianate in the amount 0.002- 0.050 g per 1.0 g of silver. EFFECT: enhanced sensitivity of emulsion, facilitated production. 1 tbl

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RU 2 047 207 C1

Authors

Kagakin E.I.

Larichev T.A.

Spirina Ju.R.

Moskinov V.A.

Dates

1995-10-27Published

1993-07-19Filed