Positive PS version failure analysis - graphic is too deep

1, underexposure: Should increase the exposure time, so that the dark part of the white point full photolysis.

2, underdeveloped: increase the development time or developer concentration, so that the dark part of the white point clear.

3, the original part of the blank density is too high, can be appropriately increased exposure time, severe should be re-plate.

4, ink paste paste version: use gasoline to wash the ink, use the cleaning agent to clean up the layout, to re-ink; the ink should be kept when the layout of a certain amount of water, to mention the ink should be thin, after the ink to clean the protective rubber.

5. The graphics caused by the operation of the offset press are too deep.

(1) When the pressure of the printing press is too heavy or the rubber liner is disqualified to cause ink diffusion, the pressure of the offset press or the liner should be reduced as much as possible.

(2) Offset ink roller pressure Heavy water roller pressure is light.

(3) The ink used in the offset press is too thin, the oiliness is too large, and the imprinting is easy to expand.

(4) Plate fountain solution is not suitable.

(5) The temperature of the offset shop is too high, should be reduced to keep the temperature at the end of 20-25 °C

(to be continued)