Abstract: A color photographic recording material comprising at least one layer of which the primary sensitivity is blue, another layer of which the primary sensitivity is green and a further layer of which the primary sensitivity is red, gives satisfactory density graduations for details of high color saturation when a red sensitivity is produced in at least one layer, of which the primary sensitivity is green, and in at least one layer, of which the primary sensitivity is blue, the primary sensitivity being 8 to 25 DIN higher than the secondary sensitivity.

Abstract: Compounds corresponding to the following formula(MS--Het--(Ar).sub.m --NR.sup.1 --CO) .sub.n R.sup.2which are contained in a color-photographic recording material in a silver-free layer between a layer containing colloidal silver and a silver halide emulsion layer, improve the storage stability of the material.

Abstract: Improved photographic recording materials containing at least one silver halide emulsion layer with comparatively high sensitivity and at least one silver halide emulsion layer with comparatively low sensitivity. Color couplers and DIR compounds of differing reactivities are associated with these layers.

Abstract: The light-sensitive color photographic silver halide recording material contains in at least one of its light-sensitive gelatine-containing layer, color formers for the formation of the image dyes in the three primary colors, a crosslinking agent activating the carboxyl groups of gelatine selected from carbamoylonium salts, carbamoylpyridinium salts and carbamoyloxypyridinium salts and a compound acting as aldehyde-scavenger which corresponds to the general formula ##STR1## wherein Z represents the atoms required for completing a 5-6-membered substituted or unsubstituted carbocyclic ring or a substituted or unsubstituted heterocyclic ring which may contain oxygen, nitrogen or sulfur as hetero-atom.

Abstract: A photographic recording material contains in a silver halide layer an emulsion mixture of at least one light sensitive silver halide and a comparatively non-light sensitive silver salt and in a second layer, which is in waterpermeable arrangement, an antifogging agent or a precursor compound thereof.

Abstract: Hydrophilic color-forming compounds such as couplers and color-providing compounds for the dye diffusion transfer process may be emulsified with the aid of oil formers when they are in admixture with aliphatic tertiary hydroxy amino compounds as specified hereinafter.

Abstract: The light sensitive recording material which is suitable for use as recording material in computers and oscillographs contains as light sensitive substance a photochromic film forming cyclic polyimide compound.

Abstract: A photographic recording material having at least 2 panchromatically sensitized silver-halide emulsion layers differing in speed, a DIR-compound and at least 2 yellow couplers of differing coupling velocity provides an improved graininess.

Abstract: In high sensitivity color photographic recording materials the undesired color fog density is reduced by highly reactive DIR-compounds having an effective reaction velocity constant k.sub.eff of more than 20,000 [1 . mole.sup.-1 . sec.sup.-1 ] (measured at pH 10.2 by the method described hereinafter) in a concentration of from 10.sup.-5 to 10.sup.-3 mole per mole of silver halide, if contained in a light-sensitive silver halide emulsion layer or in a concentration of from 10.sup.-7 to 10.sup.-5 mole per gram of solids if contained in a silver-halide-free binder layer adjacent to a silver halide emulsion layer.

Abstract: Traces of free inhibitors for the development of silver halide which might be present as impurities of inhibitor releasing compounds or which might be prematurely released therefrom because of insufficient stability thereof during storage of the photographic material are scavenged by compounds which are capable of binding free inhibitors at pH values below 7 but to a much less extent at pH values higher than 9.

Abstract: A high sensitivity color photographic recording medium has at least two red sensitive component silver halide emulsion layer and at least three green sensitive component silver halide emulsion layers, the sensitivity of layers of the same spectral sensitivity increasing in the direction from the layer support upwards and the more sensitive red-sensitive silver halide emulsion being located between two of the green-sensitive silver halide emulsion layers.

Abstract: In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula ##STR1## R.sub.1 =hydrogen or alkyl with 1-3 carbon atoms R.sub.2 =alkyl with up to 22 carbon atoms the group --S--Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.

Abstract: In a color photographic material in which at least one of the partial images yellow, magenta and cyan is produced in a double layer consisting of a first layer of lower sensitivity and a second layer of higher sensitivity and arranged further away from the layer support than said first layer, at least one color unit, preferably the blue-sensitive and/or the green sensitive color unit consists of at least three layers.(a) a first silver halide emulsion layer of low sensitivity containing a color coupler(b) a second silver halide emulsion layer which may contain a color coupler, and(c) a third layer which is free from silver halide, but contains a color coupler,the coupler in said layers a, b and c forming on color development dyes of substantially the same color which is complementary to that of the light to which the layers are sensitive.

Abstract: Non-diffusible thioether compounds capable of releasing, on reaction with color developer oxidation compounds, a diffusible silver halide development inhibitor without at the same time forming permanent dyes to any substantial extent are characterized by containing a group of the formula ##STR1## or its tautomeric form, wherein Z.sup.1 represents an electron attracting substituent and X represents an aliphatic, aromatic or heterocyclic group that if released together with the sulfur atom, forms a diffusible silver halide development inhibiting mercaptane.

Abstract: Development inhibitor releasing compounds are thioether compounds capable of releasing on reaction with color developer oxidation products, a diffusible mercaptan that inhibits further development of silver halide. Useful DIR compounds correspond to the formula ##STR1## R.sup.1 represents hydrocarbyl Y represents --S-- or --NR.sup.2 --R.sup.2 represents hydrogen, hydrocarbyl or an electron-attracting substituent.X in its preferred embodiment represents a heteroaromatic group that when split of together with the sulfur atoms forms a silver halide development inhibiting mercaptane.

Abstract: For controlling in a color photographic material the gradation, graininess, sharpness, edge and interimage effect and thus improving the overall color reproduction thioether DIR compounds of the following formula are particularly useful: ##STR1## in which X is a group that if split off together with the sulfur atom forms a diffusing development inhibiting mercaptan, Y represents --O--, ##STR2## or --S--, Z represents the ring members completing a 6-membered heterocyclic ring, R.sup.1 is an aliphatic, araliphatic or aromatic hydrocarbon group, a heterocyclic group or acyl, and R.sup.2 is the same as R.sup.1 or hydrogen.

Abstract: Improved sensitivity and improved interimage effects are obtained in a multilayer color-photographic recording material having two red-sensitive, two green-sensitive and a blue-sensitive silver halide emulsion layer as well as a yellow filter layer, the more sensitive red-sensitive and the more sensitive green-sensitive layers forming a comparatively more sensitive layer unit arranged further away from the support than each of the less sensitive green-sensitive and the less sensitive red-sensitive layer but nearer to the support than the yellow filter layer underneath the blue-sensitive layer; an additional chloride-containing silver halide emulsion layer of comparatively low sensitivity containing a non-diffusible DIR compound of low reactivity is arranged within the comparatively more sensitive layer unit between the red-sensitive and the green-sensitive layers.

Abstract: Non-diffusible silver halide development inhibitor releasing thioether compounds in which a color development does not give rise to a substantial formation of permanent dyes are 1,2,5'-.DELTA..sup.2 -thiadiazoline-1,1-dioxide derivatives of the following formula or its tautomeric (.DELTA..sup.3) form: ##STR1## in which X represents an aliphatic, aromatic or heterocyclic group such that when it is split off together with the sulphur atom of the thioether bridge, it forms a diffusible mercapto compound capable of inhibiting the development of the silver halide;R.sup.1 represents hydrogen, alkyl, aryl or a heterocyclic group andR.sup.2 represents hydrogen, alkyl, aryl, a heterocyclic group or preferably acyl.

Abstract: In a process for hardening gelatine containing photographic layers, in particular multilayered photographic films, using conventional hardeners and quick acting hardeners, the surface of a layer which contains gelatine and complex forming organic or inorganic salts is exposed to the action of an aqueous solution containing a wetting agent and a quick acting hardener, the quantity of water applied with the solution being calculated so that the layer or multilayered film undergoes swelling to a certain extend, and the degree of swelling is maintained for a period from 10 to 200 seconds, whereupon the layer or multilayered film is dried at a temperature below 30.degree. C.

Abstract: A light-sensitive material containing in emulsified form photographic additives and a process for introducing these photographic additives in emulsified form into photographic hydrophilic colloid layers with at least one N-alkylphtalimide derivative of the formula ##STR1## in which R.sub.1 and R.sub.2 are as defined hereinafter; the material having improved stability properties.