Abstract: The present invention relates to a method for determining the composition of a multi-layer system showing a predetermined colour flip-flop effect, wherein the multi-layer system comprises from bottom to top a) a substrate, b) at least one first colour layer containing a colourant, which is arranged on the substrate a), c) on the at least one first colour layer an effect layer containing at least one platelet-shaped effect pigment, and d) on the effect layer c) at least one second colour layer containing a colourant, wherein each of the at least one first colour layer and of the at least one second colour layer contains a colourant being no platelet-shaped effect pigment, wherein the method comprises the following steps: i) specifying a first target value for the colour shade and/or colour brightness of the top side of the multi-layer system seen at a first observation angle, ii) specifying a second target value for the colour shade and/or colour brightness of the top side of the multi-layer system seen at a s

Abstract: A spectrally sensitized photographic silver halide emulsion, characterized in that after precipitation at least one compound of formula is added to the emulsion, wherein R1 denotes alkyl, aryl, aralkyl, alkenyl or heterocyclyl; R2 denotes H, alkyl, aryl, heterocyclyl, amino or alkoxy; R3 denotes H, alkyl, aryl, aralkyl or heterocyclyl; D denotes —OH or —NR4R5; X denotes O or N—R6; R4 denotes H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl; R5: denotes H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl; R6: denotes H, alkyl, aryl, aralkyl, alkenyl, acyl, alkoxycarbonyl, carbamoyl or heterocyclyl, the aforementioned alkyl, aryl, aralkyl, alkenyl, heterocyclyl, amino, alkoxy, acyl, alkoxycarbonyl and carbamoyl groups can be substituted, and any two of the radicals R1 to R6 can together form a heterocyclic ring, such as a pyrrolidine, piperidine, perhydroazepine, piperazine, morpholine or thiomorpholine ring, for example; as well as a photographic material comprising a

Abstract: A color photographic recording material having at least one spectrally sensitized silver halide emulsion layer, characterized in that said silver halide emulsion layer contains an oil former having a pKa value of less than 18 and a DIR coupler and the material contains at least one color coupler, wherein the color coupler and/or the DIR coupler have specific structures, is distinguished by an increased interimage effect in comparison with the prior art without sensitivity being reduced.

Abstract: A colour photographic silver halide material having a support and at least one photosensitive silver halide emulsion layer which contains a magenta coupler of the formula (I) in which R1 to R3, a, b, c and X have the meaning stated in the description, which material contains a DIR coupler of the formula (II) in which R6 to R11 have the meaning stated in the description, is distinguished by improved processing stability.

Abstract: A polymer of the formula (I): in which X1 means H or (R1)1+1—L1CO—, X2 means —(L2)m—OH or R1 means —COO−M+, —SO3−M+ or (M+)2PO32−, L1 means alkylene, arylene, aralkylene or cycloalkylene, L2 means the residue of a polyether having an average molecular weight of 200 to 3000 (number average), M+ means a cation, l means a number from 0 to 4, m means a number 0 or 1 and n means a number from 0 to 20, wherein m+n is ≧1.