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Factors affecting imaging quality of CTP plate making system
Jul 22, 2017

Factors affecting imaging quality of CTP plate making system

  1. laser

(1) the diameter and intensity of laser beam

The diameter and intensity of the laser beam determine the clarity and resolution of the plate. The smaller the diameter of the laser beam is, the closer the intensity distribution of the beam is to the rectangle (ideal distribution), the higher the clarity of the picture and text.

(2) output power and energy density of laser beam

For plate imaging, the higher the laser energy per unit area, the faster the exposure. But the laser power is too high, it will shorten the working life of the laser, and reduce the quality of the laser beam distribution, so the power should not be too high.

(3) scanning accuracy

The accuracy of the scan depends on the mechanical and electronic control part of the system. Such as Kodak's Square Spot, the use of energy around the lower part of the light valve cut spot, the spot area energy, spot edge region only + 0.2 m, effectively improve the image quality of the edge of the network.

PlateRite platemaker Agfa company Xcalibur series plate machine and screen company with high precision optical GLV grating light valve to achieve high resolution scanning plate, dynamic control of laser energy, to improve the quality of the network.

2. plate material

(1) edition base

Since CTP imaging is focused on the exposure of the CTP plate to the energy emitted by the laser light source, the flatness and surface processing requirements of the plate are very high.

(2) coating

The photographic emulsion layer on the CTP plate must be smooth and uniform without defects. Because the dot size generated in the CTP engraving machine is very small, the tiny dust falling on the plate during the process of printing will lead to the image of one person, and it is difficult to detect.

3. development conditions

Development conditions include the chemical composition, temperature, concentration, etc. of the developer. Development conditions are critical to the quality of the picture and text on the printing plate.