Hp Indigo B.v.

Gleb Romantcov

Hannoch Ron

Inna Tzomik

Faina Kogan

Daniel Skvirsky

Shai Lior

Sergio Brandriss

Mark Sandler

Ziv Gilan

Raia Slivniak

Yaron Hershman

Albert Teishev

Yaron Grinwald

Guy Nesher

Peter Nedelin

Gil Fisher

Asaf Salant

Olga Kagan

Danny Feldman

Alexander Stolov

Shiran Zabar

Rada Nuchimov

Daniel Tulchinski

Yaniv Kachlon

Herein is described a scratch-off structure comprising the following layers in order: a substrate having a first layer showing information thereon, a second layer comprising a polymeric film and being substantially transparent; a third layer comprising a transparent electrostatic ink; a fourth layer, wherein the fourth layer is coloured. Methods for making scratch-off structures and collections of scratch-off structures are also described.

Scratch-off structures

In an aspect, there is provided a method of foil printing that may comprise providing a substrate having a surface comprising a first area and a second area, wherein the first area has printed thereon a first electrostatic ink composition comprising a first thermoplastic resin and substantially lacking a pigment and the second area has printed thereon a second electrostatic ink composition comprising a second thermoplastic resin and a pigment; applying a liquid solvent composition to the first electrostatic ink composition on the first area and the second electrostatic ink composition on the second area, to swell the first and second thermoplastic resins; and contacting a foiling material with the first electrostatic ink composition on the first area, such that the foiling material selectively adheres to the first area on the surface of the substrate. In another aspect, an electrostatic and foil printing system for performing the method is provided.

Foiling involving electrostatic inks

The present disclosure relates to a process for printing a substrate. The process comprises applying an analogue primer over a print substrate. A transparent electrophotographic composition comprising a coupling agent is electrophotographically printed on the primer as a coupling layer. An electrophotographic ink composition is then printed on the coupling layer to form an image layer. The coupling layer is disposed between the primer and image layer and in contact with each of the primer and image layer.

Printing substrates

The present disclosure relates to a process for selectively printing an image onto a substrate. The process comprises electrophotographically printing a first ink composition onto selected areas of a substrate. The process also comprises applying a primer over at least the unprinted areas of the substrate. A second ink composition is printed onto the primer and the first ink composition is removed from the selected areas of the substrate. The first ink composition is a transparent electrophotographic ink composition.

Selective printing

There is provided a process for heat transfer printing, comprising electrostatically printing a transparent electrostatic ink composition () onto a transfer material (), wherein the transparent electrostatic ink composition comprises a thermoplastic resin; printing an image () on the transparent electrostatic ink composition; contacting the image with a target substrate () under conditions such that the thermoplastic resin of the transparent electrostatic ink composition is softened or molten, and separating the target substrate and the transfer material, to leave the target substrate having thereon the image and an overlying layer of transparent electrostatic ink composition. Also disclosed is a fabric having thereon an image, the image having an overlying layer of transparent electrostatic ink composition.

Heat transfer printing

Herein is described a liquid electrophotographic adhesive composition comprising a thermoplastic resin, a moisture activatable adhesive, and a liquid carrier.

Liquid electrophotographic adhesive composition

There is provided a process for preparing a laminate, comprising electrostatically printing a transparent electrostatic ink composition onto a base material, wherein the transparent electrostatic ink composition comprises a thermoplastic resin, and a charge adjuvant and/or a charge director; providing a substrate; and contacting the substrate with the transparent electrostatic ink composition while the thermoplastic resin is softened or molten, and then allowing the thermoplastic resin to harden, so that the electrostatic ink composition adheres the base material and the substrate together. Laminate materials are also disclosed.

Laminates

Disclosed herein is an electrostatic ink composition. The composition may comprise a carrier liquid, which has suspended therein: thermochromic pigment particles having a layer of thermoplastic resin thereon. Method for forming electrostatic ink composition and a substrate having the electrostatic ink composition printed thereon are also disclosed herein.

Electrostatic ink compositions

Described herein is a method for priming a print substrate for subsequently receiving a liquid electrophotographic (LEP) inkin which a surface of a print substrate is coated with a first primer using an analogue printing technique and a second primer is digitally printed to the surface of the print substrate coated with the first primer.

Priming a print substrate

A method for determining coat weight of a printed transparent electrophotographic composition is described, in which a calibration composition is added to a transparent liquid electrophotographic composition to produce a test composition, the calibration composition comprising a carrier liquid, a polymer resin, and at least 5 wt. % of an optical brightening agent based on the total solids content of the calibration composition. The test composition is electrophotographically printed onto a test substrate to produce the printed transparent electrophotographic ink composition; the fluorescence of the printed transparent electrophotographic composition is measured; and the coat weight of the printed transparent electrophotographic composition is determine based on the fluorescence of the printed transparent electrophotographic composition.

Printing methods

Herein is described an electrophotographic printing process in which a liquid electrophotographic ink image and a dry electrophotographic toner image may be printed on a print substrate.

Electrophotographic printing

Herein is disclosed a method of electrostatic printing and glossing comprising: forming a first toner image on a print substrate by electrostatically printing an electrostatic ink comprising a first resin component comprising an ethylene acrylic acid resin, an ethylene methacrylic acid resin or combinations thereof; forming a second toner image disposed on the first toner image on the print substrate by electrostatically printing a liquid electro photographic (LEP) printing composition comprising a first resin component comprising an ethylene acrylic acid resin, an ethylene methacrylic acid resin or combinations thereof, and a second resin component present in an amount of about 20% to about 80% by weight of total solids content of the LEP printing composition, the second resin component having a melting point of from about 50&#xb0; C. to about 75&#xb0; C., which is below the melting point of the first resin component, or from about 140&#xb0; C. to about 180&#xb0; C., which is above the melting point of the first resin component; heating the print substrate to at least partially melt the first or second toner image.

Electrophotographic printing and glossing

Herein is disclosed a method of electrostatic printing and foiling comprising: forming a colored toner image on a print substrate by electrostatically printing an electrostatic ink comprising a first resin component comprising an ethylene acrylic acid resin, an ethylene methacrylic acid resin or combinations thereof; forming an adhesive toner image disposed on the colored toner image on the print substrate by electrostatically printing a liquid electro photographic (LEP) printing composition comprising a first resin component comprising an ethylene acrylic acid resin, an ethylene methacrylic acid resin or combinations thereof, and a second resin component present in an amount of about 20% to about 80% by weight of total solids content of the LEP printing composition, the second resin component having a melting point of from about 50&#xb0; C. to about 75&#xb0; C., which is below the melting point of the first resin component; and forming a foiled image disposed on the adhesive toner image by heating the print substrate to at least partially melt the adhesive toner image and applying a foiling material to the print substrate such that the foiling material adheres to the at least partially molten adhesive toner image.

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Nes Ziona, Israel

Gleb Romantcov