Agfa Gevaert Nv

Agfa-Gevaert

Agfa-Gevaert Ag

Agfa-Gavaert N.v.

Jean-Marie O Dewanckele

Marcel J Monbaliu

Jos A Vaes

Piet Kok

Geert H Defieuw

Rene M De Keyzer

Johan August Loccufier

Wilhelmus Janssens

Ludo L Van Rompuy

Serge M Tavernier

Paul R Callant

David R Terrell

Ludo Van Rompuy

Kris Viaene

Marc B Graindourze

Paul Leblans

Herman J Uytterhoeven

Leon L Vermeulen

Pierre Jean De Clercq

Robert S Pauwels

Richard A Ooms

Paul Lardon

Marc H Van Bockstaele

Noel Hosten

Dirk Van Haver

Luc J Vanmaele

Gunter Helling

Hieronymus Andriessen

Lode Deprez

Stefaan Lingier

Frank P Michiels

Werner J Op De Beeck

Marc Van Den Zegel

Jan Claes

Jan A Van Den Bogaert

Eddy A Michiels

Luc J Wabbes

Sabine Emmers

Jozef P De Prijcker

Jean-Pierre A Ghekiere

Geert Vercruysse

Bart Horsten

Paul F Sterckx

Emiel Alexander Hofman

Fernand I Ketels

Franciscus Heugebaert

Ralf B Uscher

Gilbert Voortmans

Peter Van Rompuy

A silver halide coated photographic material is disclosed comprising sensitized silver bromide or silver bromoiodide tabular grains having an average thickness of less than 0.30 &mgr;m, in at least one light-sensitive layer and which is characterised in that it further contains in the said light-sensitive layer and/or at least one non-light sensitive layer at least one polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula (Ia)

Spectrally sensitized tabular grain photographic materials

A silver halide photographic material is disclosed containing a new type of hydrazide compounds represented by following general formula I, the different symbols of which are defined in the description. ##STR1## In a preferred embodiment Q is chosen from pyridinium, quinolinium or isoquinolinium. In a most preferred embodiment Q is a pyridinium substituted on the N.sup.+ with a C.sub.5 to C.sub.8 alkyl group. The photographic material is preferably a graphic arts recording material. High gradation and excellent hard dot quality are obtained.

Photographic material containing a new hydrazide type

Receiving element for use according to transfer printing, comprising on a support a receiving layer comprising a silver source, capable of being reduced by means of heat in the presence of a reducing agent, a binder and a stabilizer selected from the group of benzotriazoles, heterocyclic mercaptanes, sulphinic acids, 1,3,4-triazo-indolizines, 1,3-dinitroaryl compounds, 1,2,3-triazoles, phthalic acids and phthalic acid derivatives. The receiving element provides images with higher stability at elevated temperatures and upon exposure to light.

Receiving element for use in thermal transfer printing

A photographic light-sensitive silver halide material is provided for making negative lithographic images or direct-positive images, said material comprising a support, at least one internal latent image-type silver halide emulsion layer (in the case of direct-positive materials) or surface latent image-type silver halide emulsion layer (in the case of lithographic materials) and development-nucleating amounts of a compound or a precursor thereof, said compound having at least one quaternary heterocyclic ring system comprising at least three rings including a tetrahydropyridinium ring wherein carbon-nitrogen and carbon-carbon double bonds are also part of an aromatic ring being one of said three rings and wherein said double bonds and nitrogen atom in said tetrahydropyridinium ring are incorporated into annelated conjugated ring systems. Developing said photographic material after exposure in an alkaline surface developer rapidly converts said precursor into a ring system as defined hereinbefore.

Method for making negative lith images direct positive images

The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process using a photographic material comprising on a support a silver halide emulsion layer and a layer containing physical development nuclei comprising the steps of:

Method for obtaining a printing plate according to the silver salt

The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei and developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid characterized in that said development is carried out in the presence of a meso-ionic compound. The present invention further provides an imaging element and alkaline processing liquid for use in said method.

Method for making a lithographic printing plate according to the silver

A phosphor screen is provided, characterised in that said screen comprises at least one organozinc compound corresponding to the following general formula I: ##STR1## wherein: A=either carbon or phosphorus

Class of stabilizing compounds for phosphor screens

A phosphor screen is provided comprising a satiblizer being an organic compound or an oligomeric or polymeric compound comprising moieties corresponding to the following general formula I: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a substituted or unsubstituted alkyl- or aryl group, R.sup.5 represents hydrogen or a substituted or unsibstituted alkyl group and Z represents the atoms necessary to form a substituted or unsubstituted 5 to 8 membered ring.

A photographic element is disclosed containing a compound capable of releasing image-wise a photographic useful group (PUG) based on a mechanism involving radical formation under development conditions and splitting of a homolytically labile bond. In a preferred embodiment the compound capable of releasing the PUG is a hydrazine derivative or a 1-aryl-3-pyrazolidinone derivative.

Photographic useful group releasing system

The present invention provides a donor for use in thermal transfer printing. The donor element comprises on a support a donor layer comprising a binder and a mixture of at least two thermotransferable reducing agents capable of reducing a silver source to metallic silver upon heating. The donor element is image-wise heated while being in contact with an image receiving material comprising a thermoreducible silver source. By using a mixture of reducing agents crystallization is reduced and the obtained images exhibit an increased density and a more neutral grey hue.

Thermal transfer printing process using a mixture of reducing agents for

Negatively charged toner for use in electrostatography

Toning agents are provided for use in thermographic and photothermographic materials, either on their own or in combination with at least one other toning agent, with improved compatibility with hydrophobic media as shown by reduced crystallization and reduced diffusion through the material, which properties enabling an improved imaging performance to be achieved and in particular a more neutral image tone after storage.

New toning agents for thermographic and photothermographic materials and

The present invention provides a method for reproducing continuous tone images by means of a thermal head. The method involves the image-wise heat transfer of a reducing agent from a donor element to a receiving layer of a receiving element. The receiving element contains a thermoreducible silver source such as e.g. silver behenate. The process of the present invention provides high density images with multiple intermediate density levels.

Thermal transfer imaging process

A photographic material is disclosed containing on at least one side of the support at least one light-sensitive silver halide emulsion layer characterised in that the light-sensitive layer and/or at least one non-light sensitive layer in water-permeable relationship with the light-sensitive layer comprises at least one compound having the general formula (I)

Photographic materials containing polymeric compounds

The present invention provides a printing process using a donor element and a receiving element. The donor element comprises on a support a donor layer comprising a binder and a thermotransferable strong reducing agent capable of reducing a silver source to metallic silver upon heating. The donor element is image-wise heated while being in contact with an image receiving material comprising a thermoreducible silver source and a weak reducing agent, only being capable of reducing a silver source to metallic silver in the presence of metallic silver formed by said strong reducing agent. Image density is increased and stability of the reductor donor element can be improved.

Thermal transfer imaging system based on the heat transfer of a reducing

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Drongen, Belgium

Jean-Marie O Dewanckele