Screen Printing Faults and Countermeasures--Printing Plate Leakage

Fifteen, printing ink leak

Part of the printing ink leakage, known as the ink leakage failure, the reasons are: a part of the scraper is injured; the pressure of the scraping ink is large; the gap between the printing plate and the printing material is too large; the plate frame is deformed and the printing pressure is insufficient. The viscosity of the ink is too high; the ink is not uniform; the screen is too fine; the printing speed is too fast.

If the printing material and the ink are mixed with dust and printing is performed without processing, the plate film may be damaged due to the pressure of the squeegee; when the plate is under-exposed, the pinhole occurs, and the printing film may leak ink. At this time, adhesive tapes, etc. can be used for emergency handling from the back of the plate. If this operation is very rapid, the ink on the plate will be dried, and the entire plate must be wiped with solvent. Wipe plates are also the cause of delamination of the plate, so it is best avoided. The ink leakage of the printing plate often occurs in the ink staying part, so it is better to strengthen this part in the plate making.

In the manual printing feeding process, when the metal plate and the hard plastic plate are inserted into the printing table, a sharp corner puncture film is liable to occur, so care must be taken. It is generally best to check and reinforce before printing.

In order to prevent ink leakage, the printing plate should be inspected or repaired before printing begins: the pinholes of the printing plate should be filled, the printing plate must be fully reinforced, and printing should begin.