METHOD OF PREPARING PHOTOGRAPHIC EMULSIONS FOR COATING COLOR SEPARATED LAYER OF COLOR PHOTOGRAPHIC MATERIAL Russian patent published in 1995 - IPC

FIELD: chemical-photographic industry. SUBSTANCE: method involves the steps of: introducing polymethine dye (0.1-0.3%) which is preliminarily dissolved in ethyl alcohol into photographic emulsion melt, adding dibutyl phthalate (1.8-7.9% ), dispersing the obtained solution in aqueous gelatin (3-6%) solution in the presence of sodium dodecylbenzolsulfonate and driving ethanol off dispersion. As polymethine dye 1,1′,3-triethyl-3′-gammasulfopropyl-5, 5′-dicarbethoxyimidocarbocyanine, pyridine salt of 3, 3′-di-gamma-sulfopropyl-9-ethyl-5, 5′-diphenyloxacarbocyaninebetaine, 3-gamma-sulfopropyl-3′, 9-diethyl-4.5-benzo-5′-methoxythiacarbocyaninebetaine; 1,1′,3,3′-tetraethyl-5,5′ bis-(trifluoromethylsulfonyl)imidocarbocyanineodide or 3-allyl-3′-ethyl-4-keto-5-(1′-ethylhydroquinolydene-4′-ethylydene)-4′, 5′-diphenylthiazolinothiazolocyaninethylsulfate, salt of 3,3′-di(gamma-sulfopropyl)-4,5-benzo-5, 5′-nethoxy-9-ethylcarbocyaninebetaine are used. Dispersion is introduced into the emulsion in the amounts of 160 ˙ 10^-6 mol of dye per 1 mol of AgHal, then dispersion of protected color-forming component is introduced. EFFECT: 3-5 times reduced reticulation of color separated layers. 3 tbl