Agfa-gevaert Ag

Agfa-gevaert Aktiengesellshcaft

Agfa Ag

Johannes Sobel

Wolfgang Himmelmann

Karl-Wilhelm Schranz

Peter Bergthaller

Hans Langen

Hans Ohlschlager

Fritz Nittel

Klaus Wagner

Karlfried Wedemeyer

Gunter Helling

Erich Wolff

Erwin Ranz

Gunter Renner

Jorg Hagemann

Hans Hlschlager

Reinhart Matejec

Alfons Klein

Hans Frenken

Ralf Weimann

Rudolf Meyer

Heinrich Bussmann

Friedhelm Sommer

Kurt Browatzki

Wolfgang Schweicher

Gunter Junkers

Karl-Wilhem Schranz

A color-photographic recording material comprising at least one red-sensitive silver halide emulsion layer associated with a cyan coupler, at least one green-sensitive silver halide emulsion layer associated with a magenta coupler, and at least one blue-sensitive silver halide emulsion layer associated with a yellow coupler, at least one layer of the material containing a hydroquinone diether compound having the following formula I and optionally at least one compound having one of the formulae II, III, IV, V, SA and SB given in the description, characterized by increased light stability of the image colorants produced during chromogenic development, ##STR1## In the formula: R.sup.1 denotes alkyl, cycloalkyl or aryl;

Photographic recording material containing a hydroquinone diether

In combination with oil formers of the alkylphenol type, 3-anilinopyrazolones show absorption maxima displaced by about 8 to 12 nm towards longer wavelengths and a blue secondary absorption further displaced towards the UV range and, hence, a reduced yellow secondary density.

Color photographic recording material

A photographic recording material contains a stabilizer in polymeric form corresponding to the following formula I ##STR1## wherein the substituents have the meanings stated in the description.

Light sensitive, stabilized photographic recording material

Webs coated with several layers, of which the lowermost or uppermost layer contains an instant hardener, may be produced in a single operation by curtain coating using a V-coater when the hardening layer is guided at the negatively inclined sliding surface of the V-coater while the other layers are guided at the opposite sliding surface of the V-coater and the hardening layer is combined with the remaining layers at coating edge to form a layer packet which is applied as a free-falling curtain to the web to be coated.

Curtain coating process

Water soluble sulphates of a heteroaromatic bis- or poly-sulphone are suitable for use as hardeners for proteinaceous binders, in particular in photographic layers.

Hardeners for proteins, a layer of binder hardened therewith and a

Water-soluble adducts of tertiary amines with heteroaromatic bis- or polyvinyl sulfone compounds are suitable for hardening layers containing proteins as binder.

Hardeners for proteins, a binder layer hardened therewith and a

Heteroaromatic vinylsulphone compounds having at least two vinylsulphonyl groups each attached to a carbon atom of a heteroasomatic ring are suitable for hardening proteinic binder layers such as photographic layers containing gelatine as binder.

Hardened proteinic binder layer

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

Compounds with the structural unit ##STR1## are very valuable UV absorbents, especially in photographic recording materials.

Photographic recording element containing a UV absorbent and a silver

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,

At least one gelatin-containing layer of a photographic silver halide material is hardened with a reaction product of two compounds corresponding to the formulae

Photographic silver halide material

Compounds containing the group ##STR1## are useful in photographic materials for preventing fading of dye images.

Method of stabilizing color photographic materials and a color

Gelatin-containing layers of photographic materials are hardened by adding a compound containing from 2 to 6 sulfonyl ethyl sulfate groups in the form of its salts and activating the compound by adjusting a pH-value in the range from 6.5 to 11.

Process for hardening photographic gelatin

Compounds of the formulae ##STR1## are useful as antifading agents in photographic materials.

Color photographic materials and color photographic images

A photographic material containing protein as binding agent is hardened with a compound which contains at least two free vinyl sulfonyl groups in the molecule and which is a bisulfite addition product of a compound containing up to 6 vinyl sulfonyl groups.

Growing community of inventors

Leverkusen, Germany

Johannes Sobel