Abstract:
A polymer for a heat-sensitive lithographic printing plate precursor is disclosed wherein the polymer comprises a phenolic monomeric unit wherein the phenyl group of the phenolic monomeric unit is substituted by a group having the structure -S-(L)k-Q wherein S is covalently bound to a carbon atom of the phenyl group, L is a linking group, k is 0 or 1 and Q comprises a heterocyclic group and wherein the substitution of the polymer increases the chemical resistance of the coating of the printing plate precursor.
Abstract:
A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising a photopolymerizable layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein
said photopolymerizable layer comprises a polymerizable compound, a polymerization initiator and a binder, b) image-wise exposing said coating in a plate setter, c) optionally, heating the precursor in a preheating unit, d) treating the precursor in a gumming station, comprising a first and at least a second gumming unit, wherein the precursor is consecutively developed in said first and said second gumming unit with a gum solution, thereby removing non-exposed areas of the photopolymerizable layer from the support and gumming the plate in a single step.
Abstract:
A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support,
wherein said photopolymerizable layer comprises a polymerizable compound, a polymerization initiator and a binder, b) image-wise exposing said coating in a plate setter, c) optionally, heating the precursor in a preheating unit, d) developing the precursor off-press in a gumming unit by treating the coating of the precursor with a gum solution, thereby removing the non-exposed areas of the photopolymerizable layer from the support,
wherein said polymerization initiator comprises a solubilizing group capable of solubilizing the initiator in the gum solution.
Abstract:
An ink jet printer wherein a belt (14) transports an image receiving member (20) past a printhead (11) is equipped with rollers (13, 15) for moving the belt (14), one of the rollers having a flange (13b) and being positioned so as to force the belt against the flange.
Abstract:
A method for making a lithographic printing plate precursor is disclosed comprising the steps of (i) coating a composition having a pH ≤ 5 on a support having a hydrophilic surface or which is provided with a hydrophilic layer, said composition comprising hydrophobic thermoplastic polymer particles stabilized with an anionic dispersant, a hydrophilic binder and colloidal silica, characterized in that said silica carries a negative charge, and (ii) drying said coated composition.
Abstract:
An apparatus for printing leather including an ink acceptor applicator that applies ink directly onto a surface of the leather; an ink applicator that applies ink to the ink acceptor and/or the leather surface; an additive applicator that applies additive onto the ink acceptor, the ink and/or the leather surface; a barrier having a surface configured to contact the acceptor, ink and additive on the leather surface; and a heater that heats the surface of the barrier to a predetermined temperature or a temperature within a selected temperature range such that the barrier, which is substantially impervious to the ink and has a melting point higher than the select temperature range, contacts at least the acceptor ink and additive on the surface directly to liquify the acceptor ink and additive into the leather and the acceptor, ink and additive fuses and penetrates into the leather.
Abstract:
A method of printing into leather comprising: applying ink acceptor base coat directly to the surface of the leather; applying ink directly onto the ink acceptor base coat by inkjet technology; applying an additive onto the ink; heating a surface of a barrier which is substantially impervious to the ink to a predetermined temperature or a temperature within a predetermined temperature range; and contacting the heated barrier which has a melting point higher than the predetermined temperature range with the ink acceptor base coat, additive and ink on the leather surface directly to soften the additive, ink acceptor base coat and ink into the leather such that the ink acceptor base coat, additive and ink penetrates into the leather.
Abstract:
A negative-working lithographic printing plate precursor is disclosed which includes a support and a coating containing a photopolymerisable layer comprising a polymerisable compound including: - A free radical polymerisable group, and - at least one moiety having a structure according to Formula (I) wherein n represents an integer equal to 0 or 1; L 1 represents a divalent linking group and * denotes the linking positions to the rest of the structure, with the proviso that the carbonyl groups in Formula (I) are bonded to a carbon atom.