Agfa Gevaert Nv

Agfa-gevaert

Inge Claes

Joan T Vermeersch

Marc Irene Van Damme

Dirk Franky Kokkelenberg

Andreas Els&auml;sser

Guy Hauquier

Bart Van Der Linden

Method for making positive working printing plates from a heat mode sensitive imaging element

According to the present invention there is provided an imaging element comprising on a support having a hydrophilic surface in the order given a photosensitive layer insoluble in an aqueous alkaline solution and capable of becoming soluble in said aqueous alkaline solution upon exposure with actinic light and a thermosensitive layer comprising a masking dye rendering said thermosensitive layer opaque to light for which said photosensitive layer has spectral sensitivity and said imaging element further comprising a compound A capable of converting light into heat comprised in said thermosensitive layer or a layer adjacent thereto, characterized in that said thermosensitive layer further comprises thermoplastic particles of a hydrophobic polymer.

Imaging element for producing a lithographic plate therewith

According to the present invention there is provided a method for making on-press lithographic printing plates which require no processing. The method comprises the steps of:

Heat-sensitive imaging material and method for making on-press

The present invention provides a finisher for a lithographic plateobtained by a DTR process comprising (a) hydrophobizing agent(s) in a total concentration between 0.1 g/l and 10 g/l, (a) surface-active compound(s) and (a) polyglycol(s) or (a) carbohydrate(s), characterized in that said finisher further comprises a non-proteinic hydrophilic film-forming binder selected from the group consisting of dextrin, maltodextrin and dextran in a concentration between 10 and 200 g/l.

Method for making an offset printing plate according to the silver salt

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Kessel, Belgium

Inge Claes