presensitized aluminium offset plates

Writer： admin Time：2020-06-04 18:09 Browse：℃

Presensitized aluminium offset plates Also can be called PS plate, which is a lithographic plate (GB9851.5-90) that is pre-coated with a photosensitive layer and can be printed at any time.
 
Features

The oleophilic part of the presensitized aluminium offset plates is a diazo photosensitive resin with a high publishing base plane of about 3μm. It is a good oleophilic hydrophobic film. It is easy for ink to spread on it, but it is difficult for water to spread on it. Diazo photosensitive resin also has good wear resistance and acid resistance.

If baked at a temperature of 230-240°C for 5-8 minutes to enamelize the photosensitive film, the hardness of the printing plate can also be improved, and the printing durability of the printing plate can reach 200,000 to 300,000 sheets. The hydrophilic part of presensitized aluminium offset plates is an aluminum oxide film, with a high publishing base plane of about 0.2 to 1 μm. The hydrophilicity, abrasion resistance, and chemical stability are all relatively good, so the printing plate is also resistant to printing. high.
Presensitized aluminium offset plates have fine sand mesh and high resolution, and the dots formed are clean and complete, so the tone reproduction is good and the image clarity is high; the blank part of the PS version has a higher moisture content capacity, and the consumption of the printing plate during printing Large amount of water, easy to control water and ink balance.


 
The base of presensitized aluminium offset plates adopts aluminum foil plate with good hydrophilicity, fine metal crystal and good chemical stability. The thickness of common base is 0.5mm, 0.3mm, 0.15mm. Presensitized aluminium offset plates are made by electrolytic roughening treatment to make the surface of the aluminum plate into a sand-like shape, anodizing, sealing and other surface treatments, and evenly coating a layer of photosensitive liquid on the aluminum plate, drying and storing it. The prefabricated plate needs to be taken out in time and processed into a printing plate after exposure and development.
 
The presensitized aluminium offset plates and CTP plates produced by Henan Chalco can be freely colored, tasteless and non-toxic, and do not cause fungus growth. They have the advantages of rigidity, insulation, and good printability. They have good cooperation with many large domestic printing factories. Henan Chalco The sales of presensitized aluminium offset plates and CTP plates account for half of China's total sales volume. Henan Chalco Aluminum has such impressive achievements and Henan Chalco's strict quality control is inseparable.