Agfa-gevaert Ag

Fritz Nittel

Wolfgang Himmelmann

Johannes Sobel

Karlfried Wedemeyer

Alfons Klein

Armin Voigt

Helmut Mader

Peter Bergthaller

Klaus Wagner

Hans Langen

Erwin Ranz

Immo Boie

Gerhard Balle

Hans Hlschlager

Lothar Rosenhahn

Reinhart Matejec

Manfred Peters

Wilhelm Saleck

Helmut Haseler

Hans-Heinrich Credner

Ernst Meier

Rudolf Meyer

Karl Kuffner

Wolfgang Sauerteig

Hans Glockner

Willibald Pelz

Rudolf Tromnau

Karl Czernik

Bert Sauter

Jurgen Heinecke

Hartmut Randolph

Heinz-Gunther Auweiler

Walter Schulte

Erich Muller

A color photographic recording material containing, on a layer support, at least one blue sensitive silver halide emulsion layer and a yellow coupler associated therewith, at least one green sensitive silver halide emulsion layer and a magenta coupler associated therewith and at least one red sensitive silver halide emulsion layer and a cyan coupler associated therewith also contains, in a layer which is not sensitive to light, a compound corresponding to formula I (stabilizer) ##STR1## wherein R.sup.1 denotes H or a group which can be split off under alkaline development conditions;

Color photographic recording material for the production of color images

The adhesion of photographic layers to a film base that

Photographic silver halide element with gelatin layer containing silica

In order to be able to cast additional layers on auxiliary layers of photographic materials immediately after the latter have been cast without encountering any difficulties as regards uniformity of the cast layer and wet adherence due to incomplete conversion of the gelatine from the sol to the gel form, the auxiliary layer must contain an effective quantity of at least one compound obtained by the reaction of trihydric to hexahydric alcohols with propylene oxide.

Photographic material

Color photographic recording material which contain pyrazolone magenta couplers, in particular 3-acylaminopyrazolone magenta couplers, have increased stability to formaldehyde if a compound corresponding to formula (I) is used as oil former for the magenta couplers:

Photographic material with pyrazolone coupler and oil former

The photographic silver halide recording material contains particles of a hydroxyalkyl-alkyl cellulose dicarboxylic acid semiester having a particle size of from 0.5 to 8 .mu.m and a particle size distribution of up to .+-.2 .mu.m dispersed in a hydrophilic colloid in at least one of its outermost layers.

Photographic silver halide recording material with cellulose

An antistatic layer applied to the back of the photographic material contains (A) a mixture of sodium magnesium silicate and the sodium salt of polystyrene sulphonic acid and (B) a succinic acid semi-ester compound. The antistatic layer is distinguished by high abrasion resistance and its good qualities as writing and printing surface.

Photographic silver halide material containing an antistatic layer

The color yield and color granularity of color photographic recording materials is improved by using compounds of the general formula I as the sole or as additional oil formers in coupler-containing internal layers. The effect is particularly clear in layers having the small amount of gelatine. ##STR1## wherein: R.sup.1 is an aliphatic group having at least 8 carbon atoms,

Color photographic recording material

Hydrophobic substances, particularly hydrophobic additive for photographic layers such as couplers may be dispersed in an aqueous medium in a two--or more--stage process using an oil-former. In a main dispersion stage the total quantity of the hydrophobic substance is dispersed in the aqueous medium without oil-former or with only part of the total quantity of oil-former. The residual portion of oil-former is dispersed in the aqueous medium without hydrophobic substance in at least one further dispersion stage preceding or following the main dispersion stage. The oil-former used is preferably a compound or a mixture of compounds selected from triaryl phosphates, dialkyl phthalates, monoesters of .alpha.-substituted succinic acid or of hydrogenated phthalic acids and aliphatic or cycloaliphatic alcohols of at least 10 carbon atoms. The process yields dispersions of improved stability of digestion.

Dispersion process

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.

Color photographic recording material containing an emulsified,

Compounds of the formula ##STR1## are useful in photographic materials and processes for the color development.

Color photographic material and color photographic processes

Protein containing photographic layers are hardened by coating with a hardening solution which contains at least one quick-acting hardener which activates carboxyl groups and at least one polysaccharide.

Process for the hardening of photographic layers utilizing fast acting

A color photographic recording material is provided containing at least one dye image or a color coupler for the production of a dye image and the material contains in at least one hydrophilic layer a hydroxyindane as defined hereinafter to reduce the fading of the image dye on exposure to UV or visible light.

Color photographic material containing a hydroxyindane

The mechanical properties of gelatin layers for photographic materials are improved by the addition of water-insoluble, elastic copolymers which consist of acrylic acid or methacrylic acid esters (I) which may be mixed with other vinyl and divinyl monomers (II) and which contain comonomers (III) which contain disulfone imidoester or sulfonimidophosphoric acid ester or amide groups.

Photographic gelatine layers with improved physical and photographic

This invention relates to a color photographic material with at least one silver halide emulsion layer having improved stability against crystallization and which contains in dispersed form a open chain keto methylene coupler a naphtholic or pyrazolone color coupler substituted with a 2-cyclo-pentyl-4-t-butyl-phenoxy group in a non-coupling position.

Photographic silver halide material which contains color couplers

Anilinopyrazolone are to be prepared in high yields and with a high degree of purity by reacting a salt particularly hydrochloride of a .beta.-arylamino-.beta.-imino-propionic acid ester of one of the tautomeric formulae which are defined hereinafter with a suitable substituted hydrazine.

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Leverkusen, Germany

Fritz Nittel