Agfa-gevaert Ag

Agfa-gevaert Aktiengesellshcaft

Agfa Ag

Hans Ohlschlager

Heinrich Odenwalder

Hans Langen

Johannes Sobel

Karl-Wilhelm Schranz

Friedrich-Wilhelm Kunitz

Dirk Hubner

Oskar Riester

Wolfgang Schmidt

Wolfgang Himmelmann

Gunter Renner

Lothar Rosenhahn

Manfred Peters

Franz Moll

Bruno Mucke

Gustav Tappe

Rudolf Meyer

Klaus Sinzger

Wolfgang Sauerteig

Walter Patzold

Thomas Kaluschke

Klaus Hoffmann

Dieter Rockser

Helmut Reuss

Ulrich Griesel

Karl Steinbeck

Oxonol dyes of the formula I ##STR1## in which R.sub.1, R.sub.2 mean an optionally substituted furyl or thienyl group,

Photographic recording material

A color photographic recording material comprises in a yellow filter layer at least one dye of one of the formulae I and II ##STR1## in which R.sup.1, R.sup.3 and R.sup.5 (mutually independently) mean alkyl, cycloalkyl or aryl;

Color photographic recording material having a yellow filter layer which

A black & white paper with variable gradation containing a silver chloride-bromide emulsion, which is divided into at least three portions, one of which is sensitised with a blue sensitiser and two further portions are sensitised both with differing quantities of blue sensitiser and with differing quantities of a green sensitiser, wherein the blue sensitiser is of the formula (I) and the green sensitiser is of the formula (II) ##STR1## in which R.sub.1 to R.sub.8, X.sup.(-) and m have the meaning stated in the specification, is distinguished by an extended gradation range.

Black and white paper with variable gradation

Remarkably high inter-image and edge effects are obtained when DIR-Couplers corresponding to Formula I are added to multilayered color photographic recording materials, in particular to green sensitive or red sensitive layers. The sharpness and color reproduction may thereby be improved. ##STR1## R.sup.1 and R.sup.2 denote alkyl or an aromatic group, R.sup.3 denotes H, alkyl or acylamino,

Color photographic recording material containing a dir-coupler

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

High interimage effects and edge effects can be obtained in multilayer color photographic recording materials if yellow DIR couplers of formula I are used therein, particularly if used in green sensitized or red sensitized layers. Sharpness and color reproduction are substantially improved. ##STR1## wherein R.sup.1 denotes a straight chained or branched alkyl group with up to 18 carbon atoms;

Color photographic recording material containing a yellow DIR coupler

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

Compounds corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2 denote alkyl groups with 1 to 8 carbon atoms, an optionally substituted alkenyl group with 2 to 5 carbon atoms, an optionally substituted cycloalkyl group with 5 or 6 carbon atoms or an optionally substituted aryl group or R.sub.1 and R.sub.2 together represent the ring members required to form a 5- or 6-membered cycloalkyl or cycloalkenyl group, are suitable for use as antifoggants in photographic recording materials.

Improved photographic recording materials containing an antifoggant corresponding to the formula I ##STR1## wherein the substituents have the meanings indicated in the description.

Photographic recording material, a process for the production of

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

Yellow DIR couplers corresponding to formula I below are capable of producing remarkably powerful inhibitory effects on remote layers while their action on the layer containing them is comparatively slight: ##STR1## In the above formula, R.sup.1 represents straight-chained or branched alkyl, optionally substituted aryl or --NR.sup.5 R.sup.6,

Yellow DIR coupler with 5-furyl(1,2,4-triazole) coupling off group

New merocyanines which have at least one water-solubilizing group are useful in photographic materials in antihalation and filter layers.

Photographic recording material and new merocyanines

A photosensitive recording material containing at least one silver halide layer and an azo dye is disclosed.

Photosensitive photographic material containing a light-absorbing dye

Pyrimidone or thiopyrimidone benzothiazole monomethine cyanines are valuable spectral sensitizers for sensitizing negative silver halide emulsions in the blue region of the spectrum. In contrast to other known monomethine cyanines they have little or no desensitizing effect in the range of inherent sensitivity.

Light-sensitive photographic recording material

Non-aqueous inks having an electric conductivity of at least 10.sup.-4 Ohm.sup.-1 cm.sup.-1, a viscosity of at most 5 cP at 20.degree. C. and in which the liquid medium consists completely or predominantly of one or more solvents having each an evaporation index of less than 11 are most useful for the ink-jet recording process in which a jet of ink is ejected from a nozzle by application of pressure and after its breaking up into droplets is modulated according to the information to be recorded. Such inks are particularly useful for writing on non-absorbent surfaces.

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Bergisch Gladbach, Germany

Hans Ohlschlager