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 photopolymerizable coating on said support,
b) image-wise exposing said coating in a plate setter, c) developing the precursor, thereby removing the non-exposed areas of the coating from the support,
whereby the developing step is carried out off-press in a gumming unit by treating the coating of the precursor with a gum solution.
Abstract:
A positive-working lithographic printing plate precursor is disclosed which comprises on a support having a hydrophilic surface or which is provided with a hydrophilic layer a heat and/or light-sensitive coating including an infrared absorbing agent and a compound including a benzoxazine group.
Abstract:
The method of preparing a lithographic printing plate precursor according to the present invention comprises the steps of: providing an aluminum support; graining and anodizing the aluminum support; without applying a hydrophilic layer on the anodized aluminum support, coating a composition which is photopolymerizable upon absorption of light having a wavelength in the range of from 350 nm to 450 nm and comprising a polymerizable monomer or oligomer, a binder and a photo-initiator on the grained and anodized aluminum support to form a photopolymerizable layer; coating an overcoat on the photopolymerizable layer; characterized in that the ratio of the total solid amount of polymerizable monomer and oligomer to the total solid amount of binder is from 1.0 to 2.0.
Abstract:
An alkali soluble resin is disclosed comprising a first monomeric unit including at least one sulfonamide group and a second monomeric unit derived from the monomer according to the following structure:
wherein R 1 represents a structural moiety comprising an ethylenically unsatured polymerisable group; R 2 , R 3 and R 4 independently represent hydrogen, an optionally substituted alkyl, alkenyl, alkynyl, alkaryl, aralkyl, aryl or heteroaryl group or, the necessary atoms to form a five to eight membered ring.
Abstract translation:公开了一种碱溶性树脂,其包含包含至少一种磺酰胺基团的第一单体单元和根据以下结构衍生自所述单体的第二单体单元:其中R 1表示包含烯属不饱和可聚合基团的结构部分; R 2,R 3和R 4独立地表示氢,任选取代的烷基,烯基,炔基,烷芳基,芳烷基,芳基或杂芳基,或形成五至八元环的必要原子。
Abstract:
A method for making a flexographic printing master comprising the steps of: a) providing a flexographic printing support (1); b) providing an inkjet printing means (32); c) applying a mesa relief (40) on the flexographic printing support (1) with the inkjet printing means (32); and d) applying an image relief (38) with the inkjet printing means on the mesa relief (40). A method for making a flexographic printing master with the imaging apparatus is also disclosed.
Abstract:
An inkjet printing method comprising in order the steps of: a) providing to an inkjet printer at least two or more colourless liquids having a different composition and at least one colour inkjet ink; b) mixing said colour inkjet ink in a controlled amount with said two or more colourless liquids; and c) printing the ink-mixture of said colour inkjet ink and the two or more colourless liquids with the inkjet printer onto an ink-receiver. Also disclosed are an inkjet printer and an inkjet ink set comprising at least two or more colourless liquids having a different composition and a colour inkjet ink.
Abstract:
Radiation curable compositions containing at least one dialkylamino substituted aromatic co-initiator having at least one polymerizable ethylenically unsatured group and at least one polymerizable Norrish Type II photoinitiator are disclosed exhibiting improved compatibility with and solubility in radiation curable compositions. Radiation curable compositions and inkjet inks containing these polymerizable Norrish Type II photoinitiators exhibit low extractable amounts of the photoinitiators, co-initiators and their residues after curing.
Abstract:
A method for making a dot for dot proof for a printing device, such as a press, on another device, such as a proofer, the method including (a) inputting, at pixel level, binary or pseudo-binary data (10) indicating at a given pixel screened colorant values of the printing device; (b) inputting contone colorant values 20 of the printing device indicating a color in a neighborhood of the given pixel; (c) outputting colorant values 30 for the other device at the given pixel, based on the input contone colorant values 20 and on the input binary or pseudo-binary data 10, such that a color match is obtained with a given color behavior of the printing device
Abstract:
A heat-sensitive positive-working lithographic printing plate precursor comprising (1) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (2) a heat-sensitive coating, comprising - an underlayer on said support and thereon an upperlayer, - an IR absorbing agent in at least one of said underlayer and upperlayer, - a phenolic resin in said upperlayer, and - a first polymer in said underlayer,
characterised in that said first polymer is an alkaline soluble polymer comprising a first sulfonamide containing monomeric unit having a specified structure according to formula I or formula II and a second amide containing monomeric unit having a specified structure according to formula III. The printing plates show an improved chemical resistance of the coating and a reduced undercutting of the image forming parts of the coating.