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, and (ii) a coating provided thereon, wherein said coating comprises 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 polymer comprising a cyclic vinyl amide monomeric unit, wherein an adhesion promoting compound is present in the intermediate layer or in the photopolymerizable layer, wherein said adhesion promoting compound is a compound capable of interacting with said support, (b) image-wise exposing said precursor, (c) optionally, heating the precursor in a preheating unit, (d) mounting the exposed precursor on a plate cylinder of a lithographic printing press, (e) developing by rotating the plate cylinder while feeding dampening liquid and/or ink to the coating, thereby removing non-exposed areas of the coating, characterised in that said cyclic vinyl amide monomeric unit has the structure of formula (I) wherein n is an integer ≥1, a is an integer ≥1, when n =1, or a is an integer ≥0, when n =2, and Q represents an optionally substituted alkyl, alkenyl, aryl or arylalkyl group.
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 reactive 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 , whereby said reactive binder is a polymer containing a monomeric unit which comprises a group having an ethylenically unsaturated bond.
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, 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 coating from the support, whereby said coating further comprises a compound capable of interacting with the support, said compound being present in said photopolymerizable layer and/or in said intermediate layer.
Abstract:
Printing members that include a plasma polymer layer exhibit enhanced tolerance for high imaging-power densities. The plasma polymer layer may contain or be adjacent to an oleophilic metal such as copper.
Abstract:
Lithographic printing plates are imaged using an inkjet printer to imagewise apply a chemical or masking agent onto the plate surface. In some embodiments, the chemical causes an affinity change, thereby facilitating lithographic printing.
Abstract:
Infrared absorbing compounds in which both the anion and the cation absorb infrared radiation, imageable elements that contain these compounds, and methods for forming images using the imageable elements are disclosed. The compounds have the structure (I) and (II) in which Y 1 and Y 2 are each independently hydrogen, halo, alkyl, diphenylamino, or phenylthio; R 1 , R 2 , R 3 and R 4 are each independently hydrogen, methyl, or SO 3 - , with the proviso that two fo R 1 , R 2 , R 3 , and R 4 are SO 3 - ; R5 and R6 are each independently an alkyl group; Z 1 , Z 2 , Z 4 and Z 5 are each independently a benzo group or a nophtho group; Z 3 and Z 6 are each independently two hydrogen atoms, a cyclohexene residue, or a cyclopentene residue; X 1 , X 2 , X 3 , and X 4 are each independently S, O, NH, CH 2 , or C(CH 3 ) 2 ; and n 1 and n 2 are each independently 0 to 4.
Abstract translation:公开了阴离子和阳离子吸收红外辐射的红外吸收化合物,含有这些化合物的可成像元素以及使用可成像元件形成图像的方法。 所述化合物具有其中Y 1和Y 2各自独立地为氢,卤素,烷基,二苯基氨基或苯硫基的结构(I)和(II) R 1,R 2,R 3和R 4各自独立地为氢,甲基或SO 3 - ,条件是两个R 1,R 2,R 3和R 4为SO 3 - 。 R5和R6各自独立地为烷基; Z 1,Z 2,Z 4和Z 5各自独立地为苯并基或nophtho基; Z 3和Z 6各自独立地为两个氢原子,环己烯残基或环戊烯残基; X 1,X 2,X 3和X 4各自独立地为S,O,NH,CH 2或C(CH 3)2; n1和n2各自独立地为0〜4。
Abstract:
A method of producing a printing plate comprises: (a) providing a printing plate precursor (101) comprising a topmost etchable first layer (106) and a second layer (102) located below the first layer, wherein the first and second layers have different affinities for at least one printing liquid; (b) imagewise providing atomized fluid particles (122) in an interaction zone (120) located above the surface (103) of the first layer; and (c) imagewise directing laser energy (125) into the interaction zone (120), wherein the laser energy (125) has a wavelength which is substantially absorbed by the atomized fluid particles (122) in the interaction zone, and the absorption of the laser energy causes the atomized fluid particles to imagewise impart kinetic energy to and etch the first layer (106). Lithographic and flexographic printing plates may be prepared according to this method, including waterless plates, negative and positive working plates, and processless plates.
Abstract:
This invention discloses lithographic printing plates having a thin releasable interlayer (20) interposed between a rough and/or porous substrate (10) and a radiation sensitive layer (30). The radiation sensitive layer (30) is bonded to the rough and/or porous substrate (10) through mechanical interlocking. Insertion of a thin releasable interlayer (20) in such a configuration minimizes cross contamination between the substrate (10) and the radiation sensitive layer (30), protects the substrate (10) from attach by environmental species and reduces ink scumming tendency of the plates while still allowing good bonding between the substrate (10) and the radiation sensitive layer (30).
Abstract:
A positive-working lithographic printing plate precursor which comprises on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a heat and/or light-sensitive coating comprising an infrared absorbing agent and a binder including a monomeric unit including an oxalylamide moiety and a monomeric unit including a solubility enhancing group.
Abstract:
A negative-working lithographic printing plate precursor is disclosed which includes a coating containing a photopolymerizable layer and optionally an intermediate layer between the photopolymerizable layer and the support, wherein the coating further comprises a polysiloxane, said polysiloxane being present in the photopolymerizable layer and/or in the optional intermediate layer, characterized in that the polysiloxane is obtainable by reacting at least one organosilicon compound represented by the general Formula (I) and at least one organosilicon compound represented by the general Formula (II) : Formula (I), Formula (II).