Hewlett-packard Indigo B.v.

Hp Indigo B.v.

Nurit Carmel-Barnea

Albert Teishev

Ilanit Mor

Yael Kowal-Blau

Guy Nesher

Haim Yosef Cohen

Tony Azzam

Getahun Biadglin

Samer Farran

Emad Masoud

Julia Kornilov

Giries Kadis

Yaron Grinwald

Reut Avigdor

Sharon Nagler

Benjamin Dayan

Rada Nuchimov

Rafael Kahatabi

Assaf Paldor

The present disclosure relates to a liquid electrophotographic composition comprising: a polymer resin comprising a side group comprising a cross-linkable moiety; and a carrier liquid.

Liquid electrophotographic composition

An electrophotographic varnish composition that comprises, in a liquid carrier, a polymeric resin; an epoxy-based cross-linking agent, a mono-epoxy diluent and a metal catalyst and/or a photo-initiator. Also described herein is a method for making such electrophotographic varnish composition.

Electrophotographic varnish composition

Herein is disclosed a liquid electrophotographic varnish composition comprising: a polymer resin; an epoxy-based cross-linking agent; a metal catalyst and/or a photo-initiator for catalyzing the cross-linking; and a carrier liquid.

Liquid electrophotographic varnish composition

Herein is disclosed an electrostatic ink composition comprising a resin and a conductive pigment, wherein the resin comprises a co-polymer formed from an alkylene monomer, an acrylic ester monomer and a maleic anhydride monomer, wherein, in some examples, the acrylic ester monomer constitutes at least about 8 wt % of the co-polymer. Herein is also disclosed a print substrate having printed thereon an electrostatic ink comprising a resin and a conductive pigment, wherein the resin comprises a co-polymer formed from an alkylene monomer, an acrylic ester monomer and a maleic anhydride monomer, wherein, in some examples, the acrylic ester monomer constitutes at least about 8 wt % of the co-polymer.

Electrostatic ink compositions

Herein is disclosed an electrostatic ink composition comprising: a) chargeable particles comprising a resin; b) a charge director comprising a sulfosuccinate salt of the general formula M'A, wherein M&#x2032; is a metal, m is the valence of M&#x2032;, and A is an ion of the general formula (I): (I) [R&#x2014;O&#x2014;C(O)CHCH(SO)C(O)&#x2014;O&#x2014;R]wherein each of Rand Ris an alkyl group; and c) an optionally substituted naphthalene-sulfonate moiety. Also disclosed is a method of manufacturing an electrostatic ink composition and a printed medium having printed thereon an electrostatic ink composition.

Methods of Printing and Electrostatic Ink Compositions Herein are disclosed electrostatic ink compositions, methods of printing and printed substrates. In some examples, the electrostatic ink composition comprises a carrier liquid, particles comprising a graft co-polymer comprising an acrylate polymer backbone onto which has been grafted polysiloxane side chains, wherein the particles are dispersed in the carrier liquid.

Methods of printing and electrostatic ink compositions

In an LEP printer having a wiper blade for wiping a photo imaging plate, the photo imaging plate may include a PIP foil with a trailing edge having a zone of a roughening pattern which includes notches that are inclined with respect to a contact line of the wiper blade. The zone of roughening pattern is confined between two opposite margins lacking any roughening.

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Nes Ziona, Israel

Nurit Carmel-Barnea