Abstract:
A heat-sensitive negative-working lithographic printing plate precursor comprising: a support having a hydrophilic surface or which is provided with a hydrophilic layer; and an image-recording layer comprising hydrophobic thermoplastic polymer particles and an infrared light absorbing dye; characterized in that: said image-recording layer further comprises a compound, said compound comprising an aromatic moiety and at least one acidic group or salt thereof and having a most bathochromic light absorption peak at a wavelength between 300 nm and 450 nm.
Abstract:
A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including an imaging layer, and, optionally, an intermediate layer between the imaging layer and the support, wherein the imaging layer includes a switchable polymer, b) image-wise exposing the coating, whereby the polymer undergoes a chemical reaction induced by the exposing step thereby creating a lithographic image consisting of printing areas and non-printing areas wherein the non-printing areas are removable from the support by a gum solution, and c) developing the precursor by treating the coating of the precursor with the gum solution thereby removing the non-printing areas.
Abstract:
A method of preparing a lithographic printing plate including the steps of providing a lithographic printing plate precursor including a photopolymerizable coating provided on a hydrophilic support;—image-wise exposing the precursor;—pre-heating the exposed precursor;—developing the exposed precursor in a gum solution; wherein after pre-heating and before developing the precursor an accelerated cooling of the precursor is carried out and the cooling does not essentially remove a part of the coating of the precursor.
Abstract:
A lithographic printing plate precursor comprising an image-recording layer, said image-recording layer being photopolymerizable upon exposure to light having a wavelength of from 300 to 500 nm and containing a mixture of sensitizers.
Abstract:
A lithographic printing plate precursor comprising an image-recording layer, said image-recording layer being photo-polymerizable upon exposure to actinic light and containing a mixture of sensitizers characterized in that said mixture of sensitizers has in 1-methoxy-2-propanol at 80° C. a solubility of at least 30 wt. %. and preferably a MetaStable Zone Width (MSZW) of at least 8.5° C., said MSZW measured at a cooling and heating rate of 0.2° C./minute.
Abstract translation:一种包含图像记录层的平版印刷版原版,所述图像记录层在曝光于光化反应之后可光聚合并含有敏化剂混合物,其特征在于所述敏化剂混合物在1-甲氧基-2-丙醇中具有80 ℃至少30重量%的溶解度。 %。 并且优选地为至少8.5℃的MetaStable Zone Width(MSZW),所述MSZW以0.2℃/分钟的冷却和加热速率测量。
Abstract:
A method of making a lithographic printing plate includes the steps of a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator, and a reactive binder; b) image-wise exposing the coating in a plate setter; c) optionally, heating the precursor in a pre-heating 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 the reactive binder is a polymer containing a monomeric unit which includes a group having an ethylenically unsaturated bond.
Abstract:
A method of making a lithographic printing plate includes the steps of a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support, b) image-wise exposing the coating in a plate setter, c) optionally, heating the precursor in a preheating unit, and 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 coating from the support, wherein the coating further includes a compound capable of interacting with the support, the compound being present in the photopolymerizable layer and/or in the intermediate layer.
Abstract:
A photo- or electron beam curable composition comprising a polymer or copolymer and a (meth)acrylate type monomer having at least three (meth)acrylate group per monomer molecule and at least one ethyleneoxy group per (meth)acrylate group in said monomer is suitable for use in the top-coat layer of a photostimulable phosphor screen comprising a support, a storage phosphor layer and an outermost top-coat, more particularly when said top-coat comprises a cellulose ester polymer.
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:
Disclosed is a method of making a lithographic printing plate which includes providing a lithographic printing plate precursor having a coating therein, image-wise exposing the coating, and developing the precursor. The coating includes (i) a contiguous photopolymerizable layer of a photopolymerizable composition or (ii) a contiguous intermediate layer with a photopolymerizable layer of a photopolymerizable composition thereon. The photopolymerizable composition includes a polymerizable compound, a polymerization initiator and a first polymer. The contiguous photopolymerizable layer or the contiguous intermediate layer also includes an adhesion promoting compound and a second polymer.