Colour photographic material contg. pyrazolo:triazine magenta coupler - with stabilising hydroquinone gp. linked to chromophore by alkyl or alkoxy-alkyl chain to increase light fastness of dyestuff

摘要

Colour photographic material has a base with AG halide (AgX) emulsion coat(s) and immobile magenta coupler(s) comprising 6-alkyl-3-(4-substd.-phenoxy)-(alkoxy)alkyl)-pyrazolo(3,2-c) -1,2,4-triazole cpd(s) of formula (I): In the formula R1 = alkyl; R2 = alkyl, opt. substd. by OH, alkoxy, -COOH or aryl; R3 = alkyl or aryl; t = 0-4; or R2 + R3 = a gp. completing a (substd.) 5-7-membered ring: L = (oxa)alkylene: and X = H or labile gp.. AgX is at least 98 mole-% AgCl. The base reflects light. At least one of the light-sensitive costs contains a phenolic cyan coupler with a ballasted acylamino gp. in the 2-position and ethyl gp. in the 5-position; and at least one contains a pivaloylacetanilide yellow coupler. USE/ADVANTAGE - The material is esp. suitable for colour negative and reversal films and paper. The use of a chain (L) of only C or C and O atoms between the chromophore (pyrazolotriazole) gp. and hydroquinone stabiliser gp. increases the light fastness of the dyestuff.