Всесоюзный Государственный Научно-Исследовательский И Проектный Институт Химико-Фотографической Промышленности
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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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.
SU3776143/04A1984-06-201984-06-20Method of bromo-iodo-silver photographic emulsion preparing
SU1210581A1
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