摘要:
A developing solution for developing a light-sensitive lithographic plate having a o-quinonediazide compound-containing light-sensitive layer is disclosed. The developing solution is comprised of an aqueous solution containing alkali silicate and an alkali aqueous solution-soluble compound of a metal selected from the group consisting of Sn, Pb, Fe, Co and Ni. The developing solution provides excellent resolving power, has excellent development stability, processing capability and adaptability with respect to automatic developing machines.
摘要:
A developer for a light-sensitive lithographic printing plate having an o-quinonediazide-containing light-sensitive layer is disclosed. The developer is comprised of an aqueous solution of an alkali silicate containing an organic boron compound. The organic boron compound is represented by the formula ##STR1## the substituents are defined within the specification. By utilizing the developer of the invention it is possible to provide excellent developing power, development stability, processability and preferred forming properties during development.
摘要:
A presensitized plate for use in making a lithographic printing plate comprises a substrate; a photosensitive layer and a mat layer whose projections have an average diameter of not more than 100 .mu.m, an average height of not more than 10 .mu.m and whose coated amount ranges from 5 to 200 mg/m.sup.2, the photosensitive layer and the mat layer being applied onto the upper surface of the substrate; and a coating layer of an organic polymeric compound having a glass transition point of not less than 20.degree. C. and a thickness ranging from 0.01 to 8.0 .mu.m, the coating layer being applied onto the back face of the substrate. The presensitized plate makes it possible to solve the problem of the formation of scratches and the adhesion of the photosensitive layer to the back face of the PS plate even when a large number of PS plates are transported and/or stored while putting them in piles without sandwiching the PS plate between interleaves. The coated layer applied to the back face of the PS plate is tough and shows good adhesion to the substrate and is not peeled off during handling, development processing and printing operations.
摘要翻译:用于制造平版印刷版的预感板包括基材; 感光层和垫层,其平均直径不大于100μm,平均高度不大于10μm,涂布量为5-200mg / m 2,感光层和垫 层施加到基板的上表面上; 以及玻璃化转变温度为20℃以上且厚度为0.01〜8.0μm的有机高分子化合物的被覆层,涂布在基材的背面。 即使在大量PS板被输送和/或储存的同时将它们放置在桩中也可以解决形成刮痕和感光层粘附到PS板的背面的问题, 将PS板夹在交错之间。 施加到PS板的背面的涂层是坚韧的,并且对基材具有良好的粘附性,并且在处理,显影处理和印刷操作期间不会剥离。
摘要:
A developing solution for a light-sensitive printing plate having an o-quinonediazide-containing light-sensitive layer is disclosed. The developing solution is comprized of an aqueous solution of alkali silicate and a chelating agent. By including the chelating agent within the developing solution it is possible to carry out development utilizing water which contains typical impurities such as insoluble calcium silicate or magnesium silicate for a long period of time which substantially has no formation of insoluble matter within the developing machine. Use of the developing solution substantially eliminate the formation of any deposit within the spraying pipes and nozzles of the developing machine which it is used in connection with.
摘要:
An improved process for restoring the hydrophilic property of stained non-image areas in a lithographic printing plate is described, which comprises treating said lithographic printing plate with a plate cleaner, wherein the improvement comprises using a plate cleaner comprising an aqueous solution containing a silicate and at least one surface active agent selected from the group consisting of cationic surface active agents and amphoteric surface active agents.
摘要:
A desensitizing gum for a lithographic printing plate and a gumming up process thereof are disclosed. The gum is comprised of water having dispersed therein 5 to 35 wt %, based on the total weight of the gum, of a film-forming, water-soluble compound selected from the group consisting of enzyme-decomposed dextrine and enzyme-decomposed etherified dextrine. The desensitizing gum exerts a desensitizing action on non-image areas of a lithographic printing plate and does not cause image blinding of image areas even when the plate is stored for a long period of time.
摘要:
A process for producing a photosensitive lithographic plate comprises coating onto a substrate having a hydrophilic surface a solution of a negative working photosensitive composition containing a photosensitive diazo resin and a linear organic polymer dissolved in a solvent mixture comprising:(a) at least 10 wt. % of 1-methoxy-2-propanol,(b) an amino group-free polar solvent having a boiling point under 1 atm of 50.degree. to 100.degree. C. and a dielectric constant at 20.degree. C. of at least 5.5, and(c) 2 to 50 wt. % of methyl lactate,and drying the coated solution.
摘要:
The present invention relates to a photosensitive composition suitable for the use in the preparation of a photosensitive lithographic plate. The photosensitive composition comprises (1) a polymer having a maleimido group in its side chain and being capable of being photocrosslinked, such as a copolymer of methyl methacrylate/N-[2-(methacryloyloxy)-ethyl]-2,3-dimethylmaleimide/methacrylic acid=15/65/20 (weight ratio) and (2) a diazo resin such as dodecylbenzenesulfonate of condensate of p-diazodiphenylamine and formaldehyde.
摘要:
The apparatus and method for measuring the intraocular pressure of an eyeball is constructed so that the image of the fluorescent ring around the flattened surface of the eyeball is formed to measure the area of the flattened surface, and that the intraocular pressure of the eyeball is calculated in accordance with the pressure against the eyeball and the area of the flattened surface corresponding thereto.
摘要:
A color measuring apparatus including a photoelectric conversion device for outputting basic color signals corresponding to quantities of light of basic color components of a sample, respectively, a calculating device for calculating a color value of the sample in a predetermined colorimetric system, a target setting device for setting a target color value of the sample in the predetermined colorimetric system, a region setting device for setting a predetermined region containing the target color value, a region decision device for deciding whether or not the color value falls within the predetermined region, an approximation decision device for deciding whether or not the color value has most approximated to the target color value and an output device for outputting a result of the decision of the approximation decision device.