Agfa-gevaert

Agfa Graphics Nv

Patrick Albert Mertens

Frank P Michiels

Werner J Van De Wynckel

Benny Jansen

Guido Vital Desie

Etienne A Van Thillo

Roland Claes

Rene M De Keyzer

Dirk Cyriel Quintens

Bavo A Muys

Guy Damen

Jozef Boeykens

Peter Maessen

Paul Smet

Filip Vandaele

Method for cleaning a lithographic printing plate comprising the step of applying a liquid to the plate including an aqueous phase, a solvent phase and at least one alkyl (poly) glucoside, said solvent phase including a mixture comprising aliphatic and/or aromatic hydrocarbons, characterized in that the amount of solvent phase in the liquid is &#x2266;40% wt.

Method for treating a lithographic printing plate

An ink-jet printing system including at least one ink-jet ink and a means for jetting an ink-jet ink onto a surface of a substantially non-absorbing ink-jet ink-receiver, characterized in that the ratio &#x3c3; S/&#x3c3; Lof the dispersive surface energy of said ink-receiver surface &#x3c3; Sover the dispersive surface energy of said ink-jet ink &#x3c3; Lis greater than 0.9. A process for ink-jet printing is also claimed. High areal throughput ink-jet printing (e.g. &#x3e;100 m/hour) with curable inks can be performed on different kinds of ink-receiver surfaces with a good image quality and colour density due to a controlled spreading of the ink-drops which can be directly cured.

Ink-jet printing system

The coating quality of an adhesive layer applied in direct contact on a polyester film is improved by using an alkyl (poly)glycoside as surfactant. A polyester film carrying such layer is suitable as support for a photosensitive material.

Adhesive layer for polyester film

An apparatus is disclosed for electrolytic desilvering of photographic processing solutions, more particularly fixing solutions or bleach-fixing solutions, comprising an electrolysis unit equiped with a monitoring system comprising a cathode, an anode and a reference electrode, characterized in that said reference electrode is a pH sensitive electrode. The desilvering is preferably performed under potentiostatic conditions. Whe using a pH sensitive reference electrode the cathodic plating potential is automatically corrected for pH changes. A preferred pH sensitive electrode is a glass electrode.

PH sensitive reference electrode in electrolytic desilvering

A silver-containing solution is de-silvered in an electrolytic cell having an anode and a cathode. The diffusion limitation current density of the electrolytic cell is estimated by measuring a current flow there-through and silver is deposited on the cathode at a de-silvering current density which is lower than the diffusion limitation current density.

Process for de-silvering of a silver-containing solution

Growing community of inventors

Beveren, Belgium

Patrick Albert Mertens