Agfa-Gevaert Ag

Agfa-Gevaert Aktiengesellachaft

Joachim W Lohmann

Erwin Ranz

Otto Lapp

Heinz-Dieter Schutz

Gunter Renner

Immo Boie

Rainer Scheerer

Wolfgang Sauerteig

Gerhard Kuhn

Martin Kupper

A color photographic recording material, in which a precursor compound for a yellow mask coupler is contained in a green-sensitive layer or in a layer adjacent thereto and in which a blue-sensitive layer is arranged between this layer and the layer support, permits very good sharpness with satisfactory speed.

Photographic recording material with a precursor compound for a yellow

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.

Photographic recording material and its use for the production of images

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.

Light sensitive photographic recording material and the use thereof for

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.

Color-photographic recording material containing a highly reactive

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.

Color photographic recording material

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.

In a color photographic material comprising a plurality of light-sensitive and non light-sensitive layers including at least two red sensitive coupler-containing silver halide emulsion layers of different speed, at least two green sensitive coupler-containing silver halide emulsion layers of different speed and a blue sensitive coupler-containing silver halide emulsion layer as well as a yellow filter layer located closer to the support than the blue sensitive silver halide emulsion layer but further removed from the support than any of the red sensitive or green sensitive layers, the sensitivity of the cyan partial image is significantly improved if the more sensitive red sensitive together with the more sensitive green sensitive silver halide emulsion layer forms a comparatively more sensitive emulsion layer unit which is located further removed from the support than a corresponding comparatively less sensitive emulsion layer unit formed by the less sensitive green sensitive and the less sensitive red sensitive silver halide emulsion layer, and the uppermost silver halide emulsion layer within the comparatively less sensitive emulsion layer unit is sensitive to the same spectral region as the lowermost silver halide emulsion layer within the comparatively more sensitive emulsion layer unit.

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.

In a color photographic recording material comprising two red sensitive silverhalide emulsion layers of differing speed and two green sensitive silver halide emulsion layers of differing speed and a blue sensitive silver halide emulsion layer wherein each of the silver halide emulsion layers has associated with it a non-diffusing color coupler, and in which the more sensitive red sensitive silverhalide emulsion layer and the more sensitive green sensitive silver halide emulsion layer together form a comparatively more sensitive emulsion layer unit, the sensitivity for red and green light as well as for blue light is increased by placing the yellow filter layer immediately below the comparative more sensitive emulsion layer unit.

Growing community of inventors

Kuerten, Germany

Joachim W Lohmann