Hole-sealing technology in producing thermal CTP plate material

Abstract

The invention discloses plugging technique in the process of making heat-sensitive CTP printing plate material, pertaining to the technical field of making method of CTP printing plate material. The plugging technique is that: soak oxidated aluminium plate material in acid solution which is zirconium fluoride kalium solution with a weight concentration of 10 to 20 percent and a PH of 4 to 5; heat the solution to 40 to 60 DEG C and soak the aluminium plate material in the solution for 20 to 30 seconds; get the aluminium plate material out and wash the aluminium plate material with hot water. The technique is reasonable, standard and is easy to operate, thereby the invention is suitable for industrial production. After holes are plugged, the printing plate material is improved in stain resistance and corrosion resistance and pressrun is increased from 80 to 100 thousand / piece to 200 to 300 thousand / piece; water retention capacity is improved, so water and ink can balance when printing, avoiding dirting a presswork; with good service effect, the technique can reduce energy consumption, therefore the invention is environment-friendly.

Description

technical field [0001] The invention relates to a production method of a heat-sensitive CTP plate used in the printing industry, in particular to a hole sealing process in the production method. Background technique [0002] Commonly referred to as CTP (Computer toplate) refers to direct printing from the computer to the printing plate, that is, "off-line direct plate making". The research and application of this technology is a major technological revolution in the contemporary printing industry. With the increasing development of CTP technology, people in the industry realize that CTP plate material is the core part of this technology. Compared with the traditional plate making process, the processing of CTP plate material is more cumbersome. CTP plates are usually divided into metal plates (mainly aluminum plates) and polyester plates according to the plate base, and can be divided into heat-sensitive plates and photosensitive resin plates according to the coating. At pr...

AI Technical Summary

Problems solved by technology

At present, the heat-sensitive CTP plates based on aluminum plates are mainly made of finished products after surface cleaning, electrolysis, ash removal, polarization, anodic oxidation, sealing, and coating. The aluminum plates forming the anodized film are dipped in acid solution, but the existing treatment process is immature, irregular, difficult to operate, not suitable for industrial production, and the sealing effect is difficult to guarantee, resulting in the corrosion resistance and pollution resistance of the plates Poor performance, poor water retention performance, difficult to achieve water-ink balance in the printing process, and the solution used is often a salt solution containing heavy metal ions such as nickel and chromium, which is not good for environmental protection