Method for manufacturing thermal sensitive CTP plate

Abstract

The invention discloses a making method and printing method of temperature-sensitive CTP plate to adapt aluminum plate as base plate, which comprises the following steps: surface disposal, three-phase electrolytic roughening treatment, ash disposal, depolarizing disposal, base plate oxidizing disposal, base plate hole-packing disposal, hydrophilic layer coating, photosensitive layer coating, drying, shearing and packing. The method reaches the ink-and-wash balance of print plate as soon as possible and overcomes dirty phenomenon, which guarantees the high quality and long print time.

Description

technical field [0001] The invention relates to a method for manufacturing a thermosensitive CTP plate. Background technique [0002] Domestic lithographic printing generally uses positive PS plates, which use aluminum plates as substrates. During manufacturing, the surface of the substrates is firstly treated to remove oil and dirt, then roughened by single-phase electrolysis, and then oxidized to form an oxide film after descaling , and finally coat the photosensitive resin layer. When printing, it must go through plate assembly, phototypesetting, development, and fixation to generate negatives, and then make up and print before printing on the machine. This method adopts single-phase electrolysis to generate a single-reticulated structure of grains, which changes the depth of the pit with the thickness of the grains. If the grains are too coarse, the water retention will be insufficient and easy to get dirty; if the grains are too fine, the micropores will The photosens...

AI Technical Summary

Problems solved by technology

To sum up, positive PS plates have poor ink-ink balance ability during the printing process, and are prone to patterned and pasted plates, followed by plate drop and smearing, and poor printing durability.