Hp Indigo B.v.

Hewlett-packard Indigo B.v.

Kodak Il. Ltd.

Afrion Digital Ltd.

Hannoch Ron

Inna Tzomik

Daniel Skvirsky

Gleb Romantcov

Shani Maor

Mark Sandler

Shai Lior

Faina Kogan

Sergio Brandriss

Murray Figov

Raia Slivniak

Alexander Stolov

Einat Glick

Yaron Hershman

Guy Nesher

Peter Nedelin

Lior Lifshitz

Dafna Or-Chen

Eyal Joseph

Anna Sigalov

Merav Shapira

Eran Goldenberg

Igal Levine

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

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

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

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

Provided in one example herein is a liquid electrophotographic ink composition. The composition comprises a charge director; a non-polar carrier fluid comprising a polymer; and ink particles each comprising a polymeric resin mixture comprising a first polymeric resin having a first melting temperature and a second polymeric resin having a second melting temperature. The second polymeric resin may be a UV-curable polymer that is solid at room temperature, and the second melting temperature is lower than the first melting temperature.

Ink composition with UV-curable polymeric resin

Herein is described a method of printing an image on a textile. The method comprises electrophotographically printing an image onto a textile substrate using an electrophotographic ink composition, applying a coating composition comprising a polymer and a crosslinking agent to the printed electrophotographic ink, and crosslinking the applied coating composition.

Textile 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

A liquid electrophotographic composition is described, which comprises a carrier liquid, a polymer resin comprising a copolymer of an alkylene monomer and a monomer selected from acrylic acid and methacrylic acid, and at least 5 wt. % of an optical brightening agent based on the total solids content of the composition.

Liquid electrophotographic composition

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.

Electrophotographic printing and foiling

A method for determining coat weight of a transparent primer coating for liquid electrophotographic printing processes is described, in which an optical brightening agent is added to an aqueous transparent primer composition in an amount of less than 0.1 wt. % based on the total solids content of the primer composition to produce a test composition, the test composition is applied onto a test substrate to produce a transparent primer coating, the fluorescence of the transparent primer coating is measured, and the coat weight of the transparent primer coating based on the fluorescence of the transparent primer coating is determined.

Primer composition and method

Liquid electrophotographic compositions, methods of manufacturing liquid electrophotographic compositions, methods of printing using liquid electrophotographic compositions and printed articles are disclosed.

Herein is disclosed 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 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.

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Kadima, Israel

Hannoch Ron