Agfa Gevaert Nv

Agfa-gevaert

Agfa Graphics Nv

Agfa-gavaert

Afga-gevaert Nv

Joan T Vermeersch

Marc Irene Van Damme

Eric Verschueren

Guido I Hauquier

Dirk Franky Kokkelenberg

Huub Van Aert

Luc H Leenders

Marc Van Damme

Paul J Coppens

Willem Cortens

Geert Deroover

Daniel M Timmerman

Yves L Verburgh

Joseph Vander Aa

Herman J Uytterhoeven

Eddie R Daems

Johan Hubert Van Hunsel

Etienne Honore Schacht

Pascal F Meeus

Augustin Meisters

Wim Sap

Erik Mostaert

Inge Claes

Guy Hauquier

Hieronymus Andriessen

Frank Louwet

Patrick Van Den Bergen

Hubertus Van Aert

Bart J Verlinden

Johan J Lamotte

Hubert Vandenabeele

Helmuth Haberhauer

Rudi A Goedeweeck

Steven Lezy

Rafael P Samijn

Jacques L Vervecken

Jean Van Trier

Thomas Nouwen

Johan August Loccufier

Norbert Lui

Wolfgang Podszun

Luc J Vanmaele

Wilhelmus Janssens

Marcel J Monbaliu

Stefaan K De Meutter

Oskar Nuyken

Etienne A Van Thillo

Rita Torfs

Ludovicus H Vervloet

Ludo Van Rompuy

Jan Gilleir

Hendrik E Kokelenberg

Bavo A Muys

Philip John Watkiss

Peter Hendrikx

Ludo Joly

Klaus Joerg

Eric M Hoes

Jacobus Herman Bosschaerts

Robert Theodoor Overmeer

Ronald Schuerwegen

Yvan Hoogmartens

Andreas Els&auml;sser

Raf Samijn

Brigitte Voit

Jurgen Stebani

Cliff Scherer

J&ouml;rg Jung

Veerle Verschueren

John W Edwards, Sr

Alexander Wokaun

Armin Lang

Andrej Stasko

Eric Verscheuren

Andreas Baindl

Sue Wilkinson

Stefan Vansteenkiste

Dirk Faes

Jorg Jung

Stefan Van Steenkiste

Fred Marland

Fred William Marland

Jos Huybrechts

Hendrikx Peter

Jan A Van Der Bogaert

Bart Braspenninckx

A heat-sensitive negative-working lithographic printing plate precursor includes on a grained and anodized aluminum support a coating including hydrophobic thermoplastic polymer particles, a hydrophilic binder, and an organic compound, wherein the organic compound includes at least one phosphonic acid group or at least one phosphoric acid group or a salt thereof.

Negative working, heat-sensitive, lithographic printing plate precursor

A heat-sensitive negative-working lithographic printing plate precursor includes a support having a hydrophilic surface or which is provided with a hydrophilic layer and a coating provided thereon, the coating including an image-recording layer which includes hydrophobic thermoplastic polymer particles, a binder, and an infrared absorbing dye; wherein the hydrophobic thermoplastic polymer particles have an average particle diameter, measured by Photon Correlation Spectroscopy, of more than 10 nm and less than 40 nm; the amount of the IR-dye, without taking into account an optional counter ion, is more than 0.80 mg per m2 of the total surface of the thermoplastic polymer particles, measured by Hydrodynamic Fractionation; and the amount of hydrophobic thermoplastic polymer particles relative to the total weight of the ingredients of the imaging layer is at least 60%.

Negative working, heat sensitive lithographic printing plate precursor

A method for making a lithographic printing plate includes the steps of (i) providing a lithographic printing plate precursor including a coating, the coating including an image-recording layer which includes hydrophobic thermoplastic polymer particles, a binder, and an infrared absorbing dye, wherein the hydrophobic thermoplastic polymer particles have an average particle diameter, measured by Photon Correlation Spectroscopy, of more than 10 nm and less than 40 nm, and the amount of the IR-dye, without taking into account an optional counter ion, is more than 0.70 mg per mof the total surface of the thermoplastic polymer particles, measured by Hydrodynamic Fractionation, and the amount of hydrophobic thermoplastic polymer particles relative to the total weight of the ingredients of the imaging layer is at least 60%; (ii) exposing the precursor to infrared light; and (iii) developing the exposed precursor in an alkaline aqueous solution.

Method for making a lithographic printing plate

A method for making a heat-sensitive negative-working lithographic printing plate precursor including the steps of

Method for making a negative-working lithographic printing plate precursor

A method of making a lithographic printing plate includes the steps of:

Method of developing a heat-sensitive lithographic printing plate precursor with a gum solution

A method is disclosed for accurate reproduction of high-quality halftone images comprising microdots by means of lithographic plate materials which comprise a heat-sensitive positive-working coating that requires wet processing. Such microdots have a dot size &#x2266;25 &#x3bc;m and may be obtained by stochastic screening or by amplitude-modulated screening at a ruling of not less than 150 lpi. It has been established that the 'physical right exposure energy density' (physical REED) lies in the range from CP to 1.5*CP, wherein the physical REED is defined as the energy density at which the physical area on the plate, occupied by a microdot corresponding to a 50% halftone in the image data, coincides with the 50% target value; and wherein CP is the clearing point of the plate which is defined as the minimum energy density that is required to obtain, after processing, a dissolution of 95% of the coating. An accurate reproduction of microdots can therefore be achieved by exposing the material with light having an energy density in the range from CP to 1.5*CP. Loss of microdots by overexposure is thereby avoided.

Method for accurate exposure of small dots on a heat-sensitive positive-working lithographic printing plate material

A positive working heat-sensitive lithographic printing plate precursor is disclosed which comprises a support having a hydrophilic surface and a coating, provided on the hydrophilic surface, wherein the coating comprises a spacer particle comprising aluminum hydroxide or aluminum oxide and having an average particle size larger than 0.3 &#x3bc;m, for improving the scuff-mark resistance of the coating. Furthermore, the coating comprises an infrared light absorbing agent, an oleophilic resin soluble in an aqueous alkaline developer and a developer resistant means.

Positive working heat-sensitive lithographic printing plate precursor

A method for making a lithographic printing plate is disclosed which comprises the steps of:

A negative-working lithographic printing plate precursor is disclosed comprising on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a coating comprising an infrared absorbing agent, a first layer comprising an aqueous dispersion comprising hydrophobic thermoplastic polymer particles and a first hydrophobic binder, and a second layer located between said first layer and said support which comprises a second hydrophobic binder, characterized in that said first hydrophobic binder is a phenolic resin and said second hydrophobic binder is a polymer comprising at least one sulphonamide group.

Negative working, heat-sensitive lithographic printing plate precursor

A method for preparing a negative-working lithographic printing plate is provided which comprises the steps of (1) providing a lithographic printing plate precursor comprising on a grained and anodized aluminum support, having a hydrophilic surface, a coating comprising (i) polymer particles which are core-shell particles having a hydrophobic heat-softenable core and a hydrophilic shell and (ii) an infrared light absorbing agent, (2) exposing said coating to heat, thereby inducing coalescence of said polymer particles at exposed areas of said coating, and (iii) developing said precursor by applying a gum solution to said coating, thereby removing non-exposed areas of said coating from said support. According to the above method the printing plates exhibit after ageing an improved clean-out and a reduced background stain, resulting in toning-free printing.

Method of making a negative-working lithographic printing plate

A method of making a lithographic printing plate is disclosed which comprises the steps of

A lithographic printing plate precursor is disclosed which comprises (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer and (ii) a coating provided thereon, the coating comprising an oleophilic layer which, upon image-wise exposure to heat or infrared light and subsequent immersion in an aqueous alkaline developer, dissolves in the developer at a higher dissolution rate in exposed areas than in unexposed areas, wherein the oleophilic layer comprises a polymer that is soluble in the developer and an organic dye in a amount sufficient to provide a visible color to the coating, characterized in that said organic dye does not reduce the dissolution rate of the unexposed areas in the developer. By using non-inhibiting dyes, the sensitivity of the precursor upon image-wise exposure is increased.

Positive-working lithographic printing plate precursor

A method for making a heat-sensitive negative-working lithographic printing plate precursor is disclosed comprising the steps of

Method for making a negative working, heat-sensitive lithographic printing plate precursor

A method of printing is disclosed which comprises the steps of

Method of lithographic printing without dampening liquid

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Deinze, Belgium

Joan T Vermeersch