Agfa Gevaert Nv

Albert Lucien Poot

Jan Frans Van Besauw

Jozef Frans Willems

Urbain Leopold Laridon

Wilhelmus Janssens

Antoine A De Jaeger

Karlfried Wedemeyer

Leon L Vermeulen

Robert J Pollet

Rene M De Keyzer

Alfons Klein

Francis J Sels

Antoon Leon Vandenberghe

Noel J De Volder

Raymond Gerard Lemahieu

Jozef Leonard Van Engeland

Gina C De Lamper

Frans Clement Heugebaert

Jozef Willy Van Den Houte

Edwin Hendrik Hazenbosch

Johannes Josephus Vanheertum

Alfons J Bertels

Hugo Vital Van Goethem

Frans Clement

Rene Alois Van Brandt

Albert P Wagemans

Antoine August De Jaeger

A method for the preparation of a planographic printing plate wherein a sheet material, which comprises an exterior hydrophilic colloid layer having concentrated on its surface a silver image formed by the silver complex diffusion transfer process with NiS or mixed crystal NiS.Ag.sub.2 S development nuclei in which the molar ratio of NiS to Ag.sub.2 S is not smaller than 1:1, is treated with a liquid for hydrophobizing the silver image for planographic printing, such liquid containing in dissolved state a heterocyclic compound corresponding to one of the following tautomeric structures (A) and (B) or (C) and (D): ##STR1## wherein: R.sup.1 represents hydrogen, amino or acylamino,

Method for the preparation of a planographic printing plate using NiS

Process for the production of a planographic printing plate by means of the silver complex diffusion transfer reversal process comprising the steps of:

Production of a planographic printing plate through the silver complex

Process for the production of a reverse reading positive line and/or halftone image suited for use in the production of a lithographic offset printing plate, said process comprising the steps of:

Production of reverse reading positive images of a straight reading

A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##STR1## wherein: R.sub.1 represents hydrogen, an aliphatic group or a cycloaliphatic group, and

Thermographic material

A method for the preparation of a planographic printing plate wherein a sheet material comprising an outer hardenable hydrophilic colloid layer on whose surface is concentrated a visible silver image that has been formed thereon from silver halide complexes according to the silver complex diffusion transfer process, is treated with an aqueous lithographic fixer having a pH in the range of 1.0 to 6.5 and containing

Fixer compositions used in planographic printing containing onium

Thermographic recording material or image-receiving material for dry copying processes comprising at least one layer and a substantially non-photosensitive reducible silver salt, a reducing agent, and optionally a toning agent or toning mixture, wherein the reducing agent corresponds to the following general formula: ##STR1## wherein: EACH OF R.sup.1, R.sup.3 and R.sup.5 (equal or different) represents hydrogen, a straight-chain or branched alkyl group comprising 1 to 9 carbon atoms, or a cycloalkyl group, with the proviso that R.sup.1 and R.sup.5 do not represent hydrogen simultaneously,

Recording materials and image receiving materials for producing copies

A photomask comprising a support that is transparent to ultra-violet radiation and visible light and a layer incorporating a photomask image, the image parts of which contain a complex compound of a silver halide and a diazonium, pyrylium, or thiapyrylium salt, wherein said complex compound is substantially opaque to ultra-violet radiation and blue light but substantially transmitting visible light in the wavelength range above 500 nm.

Production of photomasks by forming complex of silver and diazonium or

A sheet material including in working relationship with a reducible silver salt a sterically hindered phenol derivative having the following structural formula: ##STR1##

Method and materials for thermoplastic recording

A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##EQU1## wherein: R.sub.1 represents hydrogen, an aliphatic group of a cycloaliphatic group, and

Thermographic recording process

A method for the preparation of a planographic printing plate wherein a photoexposed and developed photographic material containing a pattern of poorly water-soluble silver salt is treated with an aqueous liquid which contains in dissolved state an organic cationic compound or mixture of organic cationic compounds, iodide ions, and a sufficient amount of hydronium ions (H.sub.3 O.sup.+) for creating an acidic medium, said liquid being capable of making an unexposed and undeveloped photographic silver halide material as defined in the disclosure sufficiently receptive for a lithographic ink.

Manufacture of a planographic printing plate by making silver halide

New 'duplo' quinoline compounds useful as photoconductors and having the formula: ##SPC1## Wherein:

Duplo quinoline compounds

A developing material for use in the development of electrostatic images comprising toner particles and carrier particles is described wherein the developing material incorporates at least one solid hydrophobic bivalent or trivalent metal salt of a half-ester of a branched-chain or straight-chain aliphatic dicarboxylic acid and/or at least one bivalent or trivalent metal salt of a monoester or diester of a phosphorus oxyacid. The images obtained by means of this developing material have an improved image contrast, solid area coverage and surface smoothness. The toner particles show less tendency to cake and agglomerate and have improved mechanical strength. Cleaning of the imaging surface between use and re-use is also facilitated.

Development of electrostatic images

A pressure-recording process in which a methine dye is produced by bringing image-wise into reactive contact with the aid of pressure, a compound reacting as an acid with a dye precursor compound corresponding to the following general formula: ##EQU1## wherein: R.sub.1 represents (1) an aryl group substituted with an ether group R.sub.6 --O-- in which R.sub.6 represents a hydrocarbon group or (2) a heterocyclic group; R.sub.2 represents (1) an aryl group substituted with an ether group R.sub.6 --O-- in which R.sub.6 represents a hydrocarbon group, (2) a heterocylic group or (3) a ##EQU2## group, in which Z represents the necessary atoms to close a heterocylic nucleus, R.sub.3 represents (1) a --XH or --X--R.sub.7 group, in which X is oxygen or sulfur, and R.sub.7 is an organic group, (2) a ##EQU3## group in which each of R.sub.8 and R.sub.9 (same or different) represents hydrogen or an alkyl group, a cycloalkyl group, an aralkyl group, or an aryl group, or R.sub.8 and R.sub.9 together represent the necessary atoms to close a nitrogen-containing heterocyclic nucleus, or (3) a ##EQU4## group IN WHICH R.sub.10 represents an alkyl group or a cycloalkyly group, an aralkyl group, an aryl group or a heterocyclic group and R.sub.11 represents hydrogen or a group emumerated in the definition of R.sub.10, or R.sub.11 and R.sub.10 together represent sultam group, Each of R.sub.4 and R.sub.5 (same or different) represents hydrogen, a C.sub.1 - C.sub.5 alkyl group, a cycloalkyl group, an aralkyl group or an aryl group, n is 0 or 1, and m is 0 or 1.

Pressure-sensitive recording materials

A recording process including image stabilization comprising the steps of:

Growing community of inventors

Kontich, Belgium

Albert Lucien Poot