Abstract: Dye diffusion images can be produced by a rapid process in which a first sheet material which contains at least one light sensitive silver halide emulsion on a layer support and at least one color producing compound capable of releasing a diffusible dye on development and/or a second, light insensitive sheet material containing a layer of binder in which is incorporated a salt of a weakly acidic organic compound and a strong organic base is or are moistened with an aqueous liquid and the two sheet materials are then heated to 40.degree.-120.degree. C. with their coated surfaces in contact and subsequently separated.

Abstract: Water-soluble substantially non-hardening aldehydes or water-soluble substantially non-hardening aldehyde precursor compounds are suitable as fog-reducing compounds for the photographic dye diffusion transfer process in which an imagewise-exposed color photographic recording material containing light-sensitive silver salt and a non-diffusing dye-releasing compound in at least one binder layer arranged on a layer support, is developed, preferably under the effect of heat, to produce a diffusible dye image and in which the diffusible dye image is transferred to an image receptor layer.

Abstract: Process for the production of color images by the color photographic dye diffusion process in which development is brought about by heat and water. The combination of antifoggants added to the light-sensitive material, in particular the combination of compounds of formulae I and II, produces a marked improvement in storage stability and constancy of sensitivity with good D.sub.min /D.sub.max ratios. ##STR1## R.sup.1 denotes hydrogen, alkyl with up to 6 carbon atoms, hydroxy, halogen, alkoxy or substituents which together form a condensed benzene ring, and in formula II below: ##STR2## R.sup.2 denotes a group which can be split off in the process of development of the material andR.sup.3 denotes hydrogen, halogen, alkyl with up to 4 carbon atoms, alkoxy, carboxy, carbalkoxy, carbonamido or sulphonamido.

Abstract: Dye releasing compounds which release dyes corresponding to formula I ##STR1## wherein R.sup.1 denotes alkyl, aryl, arylamino, alkoxy or aryloxy,R.sup.2 denotes H or halogen,R.sup.3 denotes alkyl with 2-4 carbon atoms,R.sup.4 denotes H or one or more substituents such as alkyl, alkoxy, acylamino or halogen, including a substituent in the ortho-position to the group ##STR2## which together with R.sup.5 completes a cyclic amino group, R.sup.5 denotes alkyl with up to 4 carbon atoms or a group which together with a subsituent denoted by R.sup.4 or together with R.sup.6 completes a cyclic amino group, andR.sup.6 denotes alkyl with up to 4 carbon atoms or a group which together with R.sup.5 completes a cyclic amino groupare suitable for the production of light-stable cyan colour images.

Abstract: An image to be printed in a CRT or video color printer is sensed to generate red, blue and green signals respectively representing a characteristic of the image in red, blue and green. The signals are processed in a matrix circuit to generate a luminance signal. The red and blue signals are subtracted from the luminance signal in operational amplifiers to obtain unadjusted difference signals. Each of the unadjusted difference signals is multiplied by an adjusting factor which is established using variable resistors and functions to provide level adjustment. The adjusted difference signals obtained in this manner are subtracted from the luminnce signal in respective operational amplifiers to yield modified red and blue signals. The modified red and blue signals are processed together with the luminanace signal in a second matrix circuit to generate a modified green signal.

Abstract: Apparatus for the exposure and development of photographic images in a photographic monosheet material having two frame members. The first frame member holds the monosheet with the photosensitive side sealed against light and moisture and the opposite side facing an opening. The second frame member is hinged on the first member. Means are provided for sealing the second member in a closed position on said first member and means are provided for applying a processing liquid to the monosheet material while the frame members are closed together.

Abstract: An imagewise exposed negative sheet (1) and a positive sheet (2) of a two-sheet diffusion material which are joined together by an adhesion strip (3), transversely to the direction of movement of the sheets (1,2), are passed for wetting in tandem through a developing liquid (6). Thereafter, the rigidity of the sheets (1,2) and the flexibility of the adhesive strip (3) are used, together with a collecting device (11) and a stop (12) for the first-wetted sheet (2) which is adjustable therein to cause an independent V-shaped folding together of the sheets (1,2) about the adhesive strip bending point (14). A deflecting device (9) is adjusted so that the V-shaped folded bending point (14) is guided into the gap between a pair of pressing rollers (10), by which it is taken up. The sheets (1,2) are pressed together and are discharged, in this condition, into a collecting tray (15) through a discharge channel (13).

Abstract: In a process and an apparatus for the exposure and development of photographic images according to the dye diffusion process a monosheet material is used, the laminated structure of which is divided by a layer which is impermeable to light but permeable to moisture into a photosensitive side of the sheet for image-wise exposure and a non-photosensitive side for observation and supplying the activator or developer solution. The said monosheet material is exposed image-wise in the dark and the photosensitive side then sealed in a light and moisture proof manner in a development apparatus in which the non-photosensitive side of the monosheet lies open and is exposed to an activator in daylight so that the image formation takes place visibly. Once the image quality has been achieved the development is stopped by removing the activator and by subsequent rinsing. The monosheet is dried in a conventional manner but only on one side.

Abstract: In order to develop color-photographic images by the color diffusion process, a first cylindrical container (1) for receiving the aqueous-alkaline working solution (4) is provided having a threaded bushing (7) on its upper edge and a contact safeguard (5) under the bushing. A second container (2) for receiving the image-wise exposed mono-sheet material (10) to be developed is also provided which has a threaded core (9), by which it may be screwed into the threaded bushing (7) of the first container (1) and may be tightly sealed therewith. Development takes place according to the overturning method and may be carried out in a lightroom.

Abstract: Color prints are prepared in the form of retained images by the dye diffusion transfer process using a photographic recording material comprising in that order a transparent layer support, a light-sensitive element containing at least one silver halide emulsion layer and a non-diffusing color-providing compound associated thereto, a light-reflecting opaque layer and a mordant layer. The recording material is subjected to imagewise exposure through the transparent layer support. During development a colored moiety is released from the color-providing compound in imagewise distribution and transferred to the mordant layer. Silver and silver halide is removed by bleaching and fixing. The colored color-providing compounds retained in the light-sensitive element in imagewise distribution complementary to the transferred colored moiety form the color image visible through the transparent layer support against the light-reflecting background of the opaque layer.

Abstract: In a color photographic recording material for the dye diffusion transfer process a transparent layer support, a light sensitive element, a light-reflecting opaque layer and an image-receiving layer form in that order a non-disconnectable assembly of layers and the light-sensitive element contains at least one silver halide emulsion layer and associated therewith an electron donor compound and a non-diffusing reducible color-providing compound that when reduced liberates a diffusible dye under alkaline development conditions. The material provides "development control on viewing" when the first part, e.g. about 2 minutes, of total development is conducted in dark and is completed at ambient light.

Abstract: The present invention relates to a method and to a processing band for processing a sheet or strip of photographic material (1) which has been image exposed and is brought into surface contact, in the presence of water, with a carrier (2) which is impregnated with the required processing chemicals. The photographic material (1) which has been image exposed is repeatedly moved along a closed path and brought into surface contact with the processing band (2) along a specified portion of said path in the presence of water, the processing band (2) having at least wo sections with different processing functions (A, B, C . . . ) arranged one behind the other, with which every portion of the photographic material (1) comes successively into contact.

Abstract: A color photographic material for the dye diffusion transfer process contains a temporary barrier layer that is applied from organic solution and consists of a mixture of(a) 40 to 95% by weight of a copolymer of 40 to 80% by weight of monomer I (vinylidene chloride, dimethyl butadiene or dichlorobutadiene) 18 to 50% by weight of monomer II ((meth)acrylonitrile or alkyl (meth)acrylate) and 2 to 10% by weight of monomer III (olefinically unsaturated copolymerizable mono or dicarboxylic acids, sulfonic acids or phosphonic acids) and(b) 5 to 60% by weight of a homopolymer of alkyl acrylate, hydroxyalkyl acrylate, N-alkyl acrylamide, N-hydroxyalkyl acrylamide vinyl acetate, or polycarbonate or cellulose acetate, or a copolymer of 80 to 99% by weight of alkyl or hydroxyalkyl acrylate and 1 to 20% by weight of a copolymerizable acid.

Abstract: White couplers which are capable of reacting with color developer oxidation products to form colorless end product with the consumption of four oxidation equivalents and which, therefore have increased absorption capacity for color developer oxidation products correspond to the formula ##STR1## or its tautomeric form, in which R.sup.1 is hydrocarbyl, heterocyclyl attached through a ring carbon, or --CO--R.sup.2R.sup.2 is alkyl, aryl, alkoxy, aminoX is --S-- or --NR.sup.3 --R.sup.3 is hydrogen, same as represented by R.sup.1 or an electron-attaching group.The four-equivalent white couplers may be contained in processing solutions or, in diffusion resistant form, in one or more layers of a colorphotographic material.

Abstract: 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 sensi

Abstract: 2-Equivalent yellow couplers for the production of yellow dye images in color photographic silver halide materials have as splittable group a nitrogen-containing 6-membered heteroaromatic ring which is linked by the said nitrogen atom to the coupling position of the coupler molecule, contains a carbonyl group adjacent said nitrogen, and also contains one or two additional nitrogens as well as a fused-on aromatic carbocyclic ring. When the heteroaromatic ring contains two additional nitrogens, all three nitrogens are vicinal; when it contains only one additional nitrogen, the splittable group is a 1,3-quinazolinone-4 having at least one carboxy, with lower aliphatic alcohols esterified carboxy, nitro, methyl or chloro substituent.

Abstract: 2-Equivalent yellow couplers for the production of yellow dye images in color photographic silver halide materials have as splittable group a nitrogen-containing 6-membered heteroaromatic ring which is linked by the said nitrogen atom to the coupling position of the coupler molecule, contains a carbonyl group adjacent said nitrogen, and also contains one or two additional nitrogens as well as a fused-on aromatic carbocyclic ring. When the heteroaromatic ring contains two additional nitrogens, all three nitrogens are vicinal; when it contains only one additional nitrogen, the splittable group is a 1,3-quinazolinone-4 having at least one carboxy, lower-aliphatic-alcohols-esterified carboxy, nitro, methyl or chloro substituent.

Abstract: Desirable 2-equivalent yellow-forming couplers in which a 1,3-diazolone-2-ring as splittable group is attached by the nitrogen in its 1-position to the coupling position of the 2-equivalent yellow-forming coupler and in which the diazolone ring has a C.dbd.C double bond adjacent to the nitrogen atom in its 1-position, have improved photographic properties in particular with respect to improved reactivity on chromogenic development and improved stability of the couplers as well as the dyes produced from them on chromogenic development in a photographic material which has been subjected to storage under moist and/or warm conditions.

Abstract: Desirable 2-equivalent yellow couplers carry at the coupling position a monocyclic pyrrole, diazole or triazole ring attached to the coupling position of the yellow coupler by a nitrogen atom, which ring can be split off in the coupling reaction.Photographic 2-equivalent yellow couplers with nitrogen-containing heterocyclic splittable groups having such nitrogen bonded to the coupling position of the couplers, are prepared by reacting a corresponding 2-equivalent yellow coupler containing a halogen such as chlorine in the coupling position with the nitrogen-containing heterocyclic compound that supplies the splittable group, in the presence of base and in the further presence of hexamethylphosphoric acid triamide as solvent.

Abstract: A light-sensitive color photographic material containing at least one silver halide emulsion layer and a 2-equivalent yellow coupler which carries at the coupling position a 5-membered heterocyclic ring with at least one nitrogen atom which nitrogen atom is attached to the coupling position of the yellow coupler and which ring has in the position adjacent to the said nitrogen atom an ethylenic double bond which forms part of an olefinically unsaturated or of an aromatic 5-membered heterocyclic ring, which ring can be split off in the coupling reaction. The new 2-equivalent yellow couplers are easy to prepare, highly reactive and photographically substantially inert.