摘要:
A heat developable photosensitive material having two or more layers superimposed on a support and containing at least (a) an organic silver salt, (b) a photocatalyst and (c) a reducing agent in one or more such layers, at least one said layers containing (d) a polymer having a repeating unit of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group; and X is a hydrogen atom, or one to three groups selected from the group consisting of a halogen atom, a nitro group, a cyano group, an alkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylsulfonyl group, an aryloxy group, an acyl group, an acyloxy group and an acylamido group.
摘要:
A block copy material for a lithographic printing plate material comprising a sheet-like substrate, on at least one side of which a plurality of minute projections are distributively formed, or a lithographic press having a plate cylinder, on a surface of which a plurality of minute projections are distributively formed, wherein the density of minute projections having a height of more than 40 &mgr;m is 20 projections/cm2 or less on surface average, and the density of minute projections having a height of 3 &mgr;m or more is 25 projections/cm2 or more on surface average. The block copy material for a lithographic printing plate material, the lithographic press and a lithographic printing method using the block copy material or the lithographic press can avoid the deterioration of the printing dimension and printing accuracy caused by strain partially developed in printing, and can solve the problem of conventional methods, the deterioration of the workability in printing.
摘要翻译:一种用于平版印刷版材料的块复制材料,其包括片状基底,其至少一侧上分布有多个微小凸起,或具有印版滚筒的平版印刷机,其表面上具有多个 分布形成微小突起,其中高度大于40μm的微小突起的密度在表面平均上为20个突起/ cm 2以下,高度为3μm以上的微小突起的密度为25个突起/ cm 2 或更多表面平均值。 用于平版印刷版材料的平版印刷材料,平版印刷机和使用块复制材料或平版印刷机的平版印刷方法可以避免印刷中部分显影的应变引起的印刷尺寸和印刷精度的劣化,并且可以解决 传统方法的问题,打印作业性的恶化。
摘要:
The present invention aims at, in an electrophotographic lithographic printing plate precursor, improving the construction and composition of back layers and in particular, preventing occurrence of printing scum by rubbing and increasing the number of prints until printing wrinkles occur. The feature of the present invention consists in an electrophotographic lithographic printing plate precursor comprising, at least, a photoconductive layer on one surface of a base and a back layer on the other surface thereof, in which the back layer comprises an outermost layer containing a hydrophilic high molecular material and an innerlayer having a Cobb's water absorbing capacity of at most 25 g/m.sup.2 (45 minute value).
摘要:
A liquid electrophotographic developing device for developing a charged and exposed photoconductive material which includes a photoconductive layer formed on one surface of a conductive layer. The liquid electrophotographic developing device is comprised of developing section, a developing solution tank provided in a housing and filled with a developing solution, conveying rollers for conveying the photoconductive materials, a developing electrode and a back electrode which are disposed parallel along a conveying path of the photoconductive material in the developing section, and a developing solution supplying device disposed above the developing electrode. The developing electrode is spaced part from the photoconductive layer, and the back electrode is disposed to come into contact with the back surface of the photoconductive material. Upon directly connecting the electrodes, toner particles contained in the developing solution adhere to the photoconductive layer to achieve development. The developing electrode does not touch the photoconductive layer to make a developed image free from soiling. The housing is covered with a lid to prevent the vaporizing of the developing solution. The developing solution is circulated through the developing section by a circulating device.
摘要:
A liquid electrophotographic developing device for developing a photoconductive material charged and exposed and which has a photoconductive layer formed on one surface of a conductive layer comprises a developing tank filled with a developing solution in which a developing electrode and a back electrode are disposed. The electrodes are immersed in the developing solution and disposed on either side of the photoconductive material in conveyance. The back electrode comes into contact with the back surface of the photoconductive material, whereas the developing electrode is spaced part from the photoconductive layer. Upon directly connecting the electrodes, toner particles contained in the developing solution adhere to the photoconductive layer to achieve development. The developing electrode does not touch the photoconductive layer, making a developed image free from soiling, the electrodes are immersed in the developing solution, preventing the drying and solidifying of the solution around the electrodes, and the developing tank is covered with a lid, preventing the vaporizing of the developing solution.
摘要:
A silver halide color photographic light-sensitive material is described comprising a support and at least one light-sensitive silver halide emulsion layer having a coupler incorporated therein and at least one light-insensitive hydrophilic colloidal layer, whereby color mixing and color stain (color fog) phenomena are prevented from occurring at the time of color development, said light-insensitive hydrophilic colloidal layer(s) containing a polymer having a repeating unit represented by formula (I) ##STR1## wherein R represents a hydrogen atom, an alkyl group containing from 1 to 6 carbon atoms, or a halogen atom; M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, or an organic base group; X represents an alkyl group containing from 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylamino group having 1 to 6 carbon atoms, or a halogen atom; m represents 0, 1 or 2; and n represents 1 or 2.
摘要:
A method of hardening gelatin which uses both a gelatin hardener and a polymer having a repeating unit of the formula (I): ##STR1## wherein R represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a halogen atom; M represents a hydrogen atom, an alkali metal atom, an alkali earth metal atom, or an organic base; X represents an alkyl group having 1 to 6 carbon atoms, an alkoxy group, an alkylamino group, or a halogen atom; m represents 0, 1 or 2; and n represents 1 or 2.
摘要:
A photographic silver halide light-sensitive material having at least one hydrophilic colloid layer containing gelatin and/or a gelatin derivative hardened with a compound represented by the following general formula (I): ##STR1## wherein a and d each represents 1 or 2; b and c each represents 0, 1 or 2 with the proviso that both b and c are not simultaneously 0; R represents a divalent group; and n is 0 or 1, which compound provides a preferred hardening rate and does not adversely affect the photographic properties of photographic light-sensitive materials, and a method of hardening gelatin and/or a gelatin derivative comprising treating the gelatin and/or the gelatin derivative with a compound represented by the general formula (I) above.
摘要:
A method of hardening gelatin which comprises treating gelatin with a compound represented by the formula (I): ##STR1## wherein X represents a hydrogen atom, an alkyl group having 6 or less carbon atoms, an aryl group having 8 or less carbon atoms, a haloalkyl group having 2 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, a halogen atom, a carboxy group, a sulfo group, a salt, an alkyl ester having 4 or less carbon atoms in the alkyl moiety or an amide of said carboxy or sulfo group, an acylamino group or a nitro group, n represents 1 or 2, and R represents a monovalent or divalent organic group.
摘要:
A lithographic printing device has a plurality of plate cylinders for respective colors. A plurality of packing sheets are respectively attached to the plate cylinders, each packing sheet having a series of protruded pieces aligned in a circumferential direction of the respective plate cylinder. A plurality of press plates respectively provided on the packing sheets, each press plate having engaging holes into which the protruded pieces of the respective packing sheet are inserted. Each series of protruded pieces satisfies the following relation: 2D≦P≦4.06×103×D/W, where P is a pitch of the series of protruded pieces, D is a diameter of each protruded piece, and W is a width of the press plate.