How much knowledge about using the PS version - Overview of common faults

1. Dirty

1) Insufficient development 2) Inappropriate sizing 3) Water roller cloth is too dirty 4) The ink is too soft (lean) / oily.
5) Oxidation: Moisture appears on the surface of the plate when it is treated with water and ink. The edition is "too dry." Plate is sucked from the water roller 6) Dirty during printing: insufficient glue in the dampening solution 7) Dirty bars around the drum: check the dampening system/ink rollers

2. The image is poorly inked, and the graphic is free from ink

1) Too much glue on graphic part 2) Excessive use of plate cleaner 3) Dirty paste of dampening solution 4) The ink lacks moisture resistance and should be replaced with ink 5) Excessive pressure between plate and blanket 6) Excessive concentration is used Fountain solution or alcohol

3 paste version

1) Ink emulsification 2) Incompatibility of ink and fountain solution 3) Detergent or cleaning agent on dampening roller 4) Improper setting of water roller 5) Reaction between dampening solution and paper

4. Edition wears out, graphics are destroyed prematurely

1) Excessive exposure 2) Oversized roller lining, ink roller set too large 3) Incompatible cleaner, solvent or blanket cleaner 4) Hard roller or blanket 5) Corrosive ink

5. Printing plate cracking

1) The roller is loose on the plate 2) The plate is folded or improperly installed. 3) The orientation of the grain is wrong. 4) The pad of the plate slips.

6. Dot increase

1) Underexposure or underdeveloped 2) Film does not make contact with the plate 3) Excessive ink supply 4) Plate or blanket is too thick 5) Inker set too hard 6) Fountain solution is too weak

7. Loss of outlets

1) Overexposure or overexposure 2) Bad contact between the film and the plate