Abstract:
A method of preparing negative-working, single-layer imageable elements improves their storage stability in a humid environment. The method includes enclosing the coated imageable elements in a water-impermeable sheet material that substantially inhibits the transfer of moisture to and from the imageable element. Such imageable elements include a radiation-sensitive composition that includes a radically polymerizable component, an initiator composition to provide radicals upon exposure to imaging radiation, a radiation absorbing compound, and a polymeric binder having poly(alkylene glycol) side chains.
Abstract:
The present invention relates to an image forming material having, on a substrate, an image forming layer that includes at least (A) a novolac type phenolic resin containing phenol as a structural unit, (B) a photo-thermal converting agent, and (C) a specific ammonium compound or a specific onium salt.
Abstract:
Disclosed is an image forming method possessing the steps of producing a planographic printing plate via a development treatment of exposing a hydrophilic surface of an aluminum support by removing a thermosensitive image formation layer provided on the hydrophilic surface, that is not imagewise heated on a printing press, after imagewise heating a planographic printing plate material having the thermosensitive image formation layer provided on the hydrophilic surface of the aluminum support, and of treating the planographic printing plate with an ink cleaning agent after printing, wherein the hydrophilic surface is colored by a colorant having a solubility of 5-100 g, based on 1 liter of n-decane, and the colorant on the hydrophilic surface exposed after removing the thermosensitive image formation layer is removed in the above step of treating the planographic printing plate with an ink cleaning agent.
Abstract:
A photosensitive lithographic printing plate comprising: a support; and a polymerizable photosensitive layer that comprises: an addition-polymerizable compound having an ethylenically unsaturated double bond; a polymerization initiator; and a polymer compound having (a) a monomer represented by formula (I) and (b) a monomer represented by formula (II) as copolymerization component: wherein Rf represents a substituent containing a fluoroalkyl or perfluoroalkyl group having 9 or more fluorine atoms; n represents 1 or 2; and R1 represents a hydrogen atom or a methyl group; wherein R21 represents a hydrogen atom or a methyl group; R22 represents a divalent hydrocarbon group having a carbon number of 3 to 30 and having an aliphatic cyclic structure; A represents an oxygen atom or —NR23—; and R23 represents a hydrogen atom or a monovalent hydrocarbon group having a carbon number of 1 to 10.
Abstract translation:一种光敏平版印刷版,包括:支撑体; 和可聚合感光层,其包含:具有烯键式不饱和双键的可加成聚合化合物; 聚合引发剂; 和具有(a)由式(I)和(b)表示的单体作为共聚成分的式(I)表示的单体的高分子化合物:其中,Rf表示含有具有9个以上氟原子的氟代烷基或全氟烷基的取代基; n表示1或2; R 1表示氢原子或甲基; 其中R 21表示氢原子或甲基; R 22表示碳数为3〜30的具有脂肪族环状结构的二价烃基; A表示氧原子或-NR 23 - ; R 23表示氢原子或碳数为1〜10的一价烃基。
Abstract:
A method of on-press developing a thermosensitive lithographic printing plate with ink and/or fountain solution is described. The lithographic plate comprises on a substrate a thermosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to an infrared radiation. The printing plate can be a pre-coated plate in the form of sheet or web, or can be prepared on press by coating a thermosensitive layer onto a substrate that is a sheet material or a seamless sleeve mounted on a plate cylinder or is the surface of a plate cylinder of the lithographic press.
Abstract:
A method of making a heat-sensitive lithographic printing plate precursor is disclosed which comprises the steps of (i) providing a web of a lithographic support having a hydrophilic surface; (ii) applying on the hydrophilic surface of the web a coating comprising a phenolic resin; (iii) drying the coating; (iv) a heating step wherein the web temperature is maintained above the glass transition temperature of the phenolic resin Tg during a period of between 0.1 and 60 seconds; (v) a cooling step wherein the web temperature is reduced at an average cooling rate which is higher than if the web would be kept under ambient conditions but not higher than 30° C./s; and (vi) winding the precursor on a core or cutting the precursor into sheets. The heating step and the cooling step provide a significant improvement of the aging behavior of the precursor. A stable sensitivity is obtained shortly after coating.
Abstract:
The present invention provides a planographic printing plate precursor having a support and, on the support, an image-recording layer containing an infrared ray absorbent, a polymerization initiator, a polymerizable compound, and a thiol compound. The planographic printing plate precursor preferably has a protective layer on the image-recording layer.
Abstract:
The planographic printing plate precursor according to the invention is a planographic printing plate precursor having a photosensitive layer containing an infrared absorbent, a polymerization initiator, a polymerizable compound, and a binder polymer and a protective layer formed in this order on a hydrophilic aluminum support surface, wherein the protective layer contains polyvinylalcohol having a saponification value of 91 mole % or more and a mica compound in an amount of 5 wt % to 50 wt % relative to the total weight of the protective layer.
Abstract:
A photopolymerizable composition comprising a polymer having a radical polymerizable group and a unit represented by the following formula (I): wherein Q1 represents a cyano group or COX2; X1 and X2 each independently represent —R— or a halogen atom, R represents a hetero atom; Ra and Rb each independently represent a hydrogen atom, a halogen atom, a cyano group or an organic residual group; X1 and X2 may be taken together to form a cyclic structure; Ra and Rb may be taken together to form a cyclic structure; and X1 and Ra or Rb may be taken together to form a cyclic structure.
Abstract translation:一种可光聚合组合物,其包含具有自由基聚合性基团的聚合物和由下式(I)表示的单元:其中Q 1表示氰基或COX 2; X 1和X 2各自独立地表示-R-或卤素原子,R表示杂原子; R a,R b和R b各自独立地表示氢原子,卤素原子,氰基或有机残基; X 1和X 2可以一起形成环状结构; R< a>和< b< b>可以一起形成环状结构; 并且X 1和R 2和R b可以一起形成环状结构。
Abstract:
A method of on-press developing a laser sensitive lithographic printing plate with ink and/or fountain solution is described. The printing member comprises on a substrate a photosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to a laser. The plate is exposed with a laser and on-press developed with ink and/or fountain solution. The exposure and development are performed with the plate under lightings that contain no or substantially no radiation below a wavelength selected from 400 to 650 nm, or in the dark or substantially dark.