摘要:
A method of producing a planographic printing plate support in which after aluminum is continuously cast directly from molten aluminum into a thin aluminum plate, the aluminum thin plate is subjected to cold rolling, heat treatment and flattening to obtain an aluminum support. The aluminum support is then subjected to surface toughening. The components of the aluminum support areFe: 0.4%-0.2%,Si: 0.20%-0.05%,Cu: not larger than 0.02%, and the Al purity is not smaller than 99.5%. After continuous casting, Fe in a range of from 20% to 90% of the Fe total content exists in a grain boundary and the rest of Fe exists as a solid solution in grains. In this case, it is preferable that in a section perpendicular to the direction of continuous casting, the grain size is in a range of from 2 .mu.m to 500 .mu.m.
摘要:
A process for preparing a lithographic support, and the printing plate made therefrom, are described, wherein the process comprises the steps of (a) liquid-honing a surface of an aluminum sheet, and (b) electrochemically graining the surface of the aluminum sheet in an electrolyte comprises hydrochloric acid, nitric acid, or a mixture thereof.
摘要:
There are disclosed a support for a planographic printing plate, which decreases dispersion in a material quality of an aluminum alloy support and improves a yield of an electrolytic graining treatment and which can produce the planographic printing plate having a small heat softening property after a burning treatment and providing a low cost, and a method for producing the same. The support for the planographic printing plate is an aluminum alloy plate comprising 0
摘要:
A method of producing a support for a planographic printing plate, which reduces the scattering in the material of the aluminum support, improves the yield of the electrolytic surface graining treatment, and is able to produce lithographic printing plates having superior surface graining aptitude. Aluminum material with a width of 1000 mm and a thickness of 6 mm is formed in the continuous casting twin-roller thin plate device. It is then cold rolled to a plate thickness of 3 mm, and after conducting annealing at 400.degree. C., cold rolling (including correction) is further conducted to bring it to 0.3 mm and form the samples. The temperature distribution of the molten metal at the outlet of the molten metal supply nozzle is kept within a predetermined range.
摘要:
A support for a planographic printing plate support in which variations in the quality of the material of the aluminum support are reduced to thereby improve the yield in an electrolytic graining treatment and which is excellent in susceptibility to graining, has no stripe irregularities, and excellent appearance, and a method for producing such a planographic printing plate. An aluminum plate material is formed through a twin-roller continuous casting apparatus and subjected to cold rolling. Successively, the plate is subjected to heat treatment so as to form a surface portion of a depth of at least 15 .mu.m in the thickness direction having no recrystallization in the surface layer. If necessary, the plate may be subjected to cold rolling again as final rolling. Thereafter, the plate is subjected to correction.
摘要:
A support for a planographic printing plate support in which variations in the quality of the material of the aluminum support are reduced to thereby improve the yield in an electrolytic graining treatment and which is excellent in susceptibility to graining, has no stripe irregularities, and excellent appearance, and a method for producing such a planographic printing plate. An aluminum plate material is formed through a twin-roller continuous casting apparatus and subjected to cold rolling. Successively, the plate is subjected to heat treatment so as to form a surface portion of a depth of at least 15 .mu.m in the thickness direction having no recrystallization in the surface layer. If necessary, the plate may be subjected to cold rolling again as final rolling. Thereafter, the plate is subjected to correction.
摘要:
Disclosed are a positive type lead-frame forming material which contains a light-sensitive material comprising an o-quinonediazide compound and a novolak resin, and a positive type lead-frame forming material which contains a positive resist composition comprising (1) a water-insoluble but alkaline water-soluble resin, (2) a compound capable of generating an acid by irradiation with active rays or radiant rays, and (3) a compound containing a group decomposable by acid which can increase its solubility in an alkaline developer through the action of the acid.
摘要:
A method of splicing together metal webs for use in planography with the ends thereof being butted or lapped against each other. In the metal web splicing method, the ends of the metal webs are spliced together in a butted manner, the splice portion thereof is welded, and the welded splice portion is rolled. According to the splicing method, there is left no level difference in the welded splice portion, which eliminates the possibility of the spliced metal webs being broken during the movement thereof and also has no ill effect on the coating process for the spliced metal webs.
摘要:
A process for producing a support for a lithographic printing plate is disclosed, comprising mechanically graining a sheet for the support with abrasive grains which have sharp-angled tips having a radius of not more than 20 .mu.m. The process is suitable for mass production, and the lithographic printing plate produced from the resulting support is excellent in stain-resistance and printing durability.