A charge transport molecule contains four radical polymerizable functional groups of the general structure exemplified below:

##STR00001##

where R.sub.1 and R.sub.2 contain a spacer group and a radical polymerizable functional group, R.sub.3 and R.sub.4 are hydrogen atoms, and R.sub.5 and R.sub.6 contain a spacer group and a radical polymerizable functional group wherein the spacer group of R.sub.1, R.sub.2, R.sub.5 and R.sub.6 is an ethyl group and the radical polymerizable functional group of R.sub.1, R.sub.2, R.sub.5 and R.sub.6 is an acrylate group.

A digital printing process that applies a liquid radiation curable primer containing 20 to 80% of at least one acrylate functional monomer and 20 to 60% of at least one thermoplastic polyurethane polymer onto a surface of a flat web or sheet substrate; cures the primer by UV or EB irradiation to give a dry, tack-free surface; and then uses a digital printing press that uses a liquid-toner-based electrographic imaging process with a press blanket to transfer a printed image from the press blanket to the cured-primer coated substrate. The resulting printed web or sheet may have a dry, tack-free semi-interpenetrating polymer network layer adjacent the printed image.

A digital printing process that applies a liquid radiation curable primer containing 20 to 80% of at least one acrylate functional monomer and 20 to 60% of at least one thermoplastic polyurethane polymer onto a surface of a flat web or sheet substrate; cures the primer by UV or EB irradiation to give a dry, tack-free surface; and then uses a digital printing press that uses a liquid-toner-based electrographic imaging process with a press blanket to transfer a printed image from the press blanket to the cured-primer coated substrate. The resulting printed web or sheet may have a dry, tack-free semi-interpenetrating polymer network layer adjacent the printed image.

A method of forming a flexible printed material is described. The method comprises applying a layer of primer onto a flexible substrate; electrostatically printing onto the layer of primer a liquid electrostatic ink composition; applying a curable overprint varnish composition onto the printed electrostatic ink composition and curing the overprint varnish composition using electron beam irradiation. The curable overprint varnish composition comprises an ethylenically unsaturated monomer, an ethylenically unsaturated oligomer, or mixtures thereof, and less than 10 wt. % of a cross-linking additive based on the total weight of the curable overprint varnish composition. A flexible package comprising the flexible printed material is also described.

A media sheet has an image-receiving layer that includes about 30 to about 70 percent calcined clay.

A method of improving the adhesion of a liquid ink to a substrate where the ink is applied to the substrate using an LEP printing process, and products therefrom.

Described herein is a process for preparing a flexible packaging material. The process may comprise: providing a first flexible substrate; printing an ink composition comprising a thermoplastic resin onto the first flexible substrate; depositing a cross-linking composition comprising a cross-linker onto the printed ink composition such that the thermoplastic resin of the ink composition is crosslinked; and laminating the first flexible substrate with a second flexible substrate such that the ink composition and the cross-linker are disposed between the first and second flexible substrates.

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.

A printable blank sheet includes a sheet with a first layer and a second layer attached to a bottom side of the first layer, slit-over-perforation line in the sheet, and an object held in the sheet. The slit-over-perforation lines define a periphery of the object in the sheet. The slit-over-perforation lines include cuts running through the first layer, and perforations running through the second layer underneath the cuts running through the first layer. A method for creating custom print objects includes running a printable blank sheet through a printer, wherein the sheet includes slit-over-perforation lines defining a periphery of an object in the sheet. The sheet is bent along the slit-over-perforation lines to weaken and separate the slit-over-perforation lines, and the object is detached from the sheet.

A charge transport molecule containing four radical polymerizable functional groups used in an overcoat for an organic photoconductor drum of an electrophotographic image forming device is provided. The charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below: ##STR00001##
where R.sub.1 and R.sub.2 contain a spacer group and a radical polymerizable functional group, R.sub.3 and R.sub.4 are selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and R.sub.5 and R.sub.6 contain a spacer group and a radical polymerizable functional group.