Agfa Gevaert Nv

Erik Mostaert

Joan T Vermeersch

Eric Verschueren

Paul J Coppens

Guido I Hauquier

Willem Cortens

Marc Irene Van Damme

August Mari En

The present invention provides a lithographic base comprising on a hydrophobic support a packet of subbing layers contiguous to a hydrophilic layer containing a hydrophilic (co)polymer or (co)polymer mixture and being hardened with a hydrolysed tetraalkyl orthosilicate crosslinking agent characterized in that said packet of subbing layers contains as undermost layer a layer comprising, a polymer latex having hydrophilic functionality and as uppermost layer a layer comprising a hydrophilic binder and silica in a weight ratio of the hydrophilic binder to silica of less than 1.

Lithographic base and a lithographic printing plate

A web or sheet material which comprises a hydrophobic resin support having coated directly thereon a primer layer essentially consisting of a mixture of ingredients (A), (B) and (C) applied as a dispersion from aqueous medium, wherein:

Primed resin film

The present invention provides a lithographic base comprising on a hydrophobic support a subbing layer and a hydrophilic layer containing a hydrophilic (co)polymer or (co)polymer mixture and being hardened with a hydrolyzed tetraalkyl orthosilicate crosslinking agent characterized in that said subbing layer contains a hydrophilic binder and silica, the surface area of the silica being at least 300 m.sup.2 per gram.

Lithographic base and a method for making a lithographic printing plate

The present invention provides a lithographic base comprising on a hydrophobic support a subbing layer contiguous to a hydrophilic layer containing a hydrophilic (co)polymer or (co)polymer mixture and being hardened with a hydrolyzed tetraalkyl orthosilicate crosslinking agent characterized in that said subbing layer contains a hydrophilic binder and silica and is applied at a solids content of more than 200 mg per m.sup.2 but less than 750 mg per m.sup.2.

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Boechout, Belgium

Erik Mostaert