I. Dirty Edition
1. As the contact pressure between the ink roll and the plate is too small, the water transfer is not smooth and uneven, and the large amount of ink in the plate forms a dirty plate phenomenon.
Solution: At this time, the contact pressure between them should be adjusted.
2. The pressure between the water roller and the water roller is too tight, which will make the wetting liquid squeezed and stay on the water roller and the water roller, resulting in abnormal water supply and the formation of dirty plate phenomenon.
Solution: The pressure between them should be adjusted.
3. When the plush jacket device is used, there is no average flattening at both ends and in the middle, and the stitching is tightened to form a wetting plate with uneven thickness, which affects the normal operation.
Solutions: The worn down velvet is fierce, the water absorption and water transfer performance are poor, and the abnormal water supply is also the source of dirty edition. The velvet sleeve should be re-sewn to make its thickness average, and the worn velvet sleeve should be replaced in time.
2. Paste Edition
1. The pressure between the landing roll and the printing plate is too small or too large; the pressure between the landing roll and the crossing roll is uncomfortable, which will cause the pasting plate due to the lack and uneven water delivery.
Solution: Suitable pressure between them should be adjusted.
2. Oil contamination on the surface of bucket roll affects normal water transfer to form paste plate.
Treatment method: scrub bucket rollers.
3. The pressure between the water transfer roll and the bucket roll and the water stringing roll is too small to transfer the embossing liquid, thus forming a paste plate phenomenon.
Solution: Adjust the pressure between them.
4. The wear and tear of the cashmere sleeve of the water roll is fierce, and the angle of the bucket roll is small or the speed of the bucket roll is too slow. It will also form a paste plate because of the lack of water supply.
Solution: Replace the new plush sleeve, increase the rotation angle of bucket roll and improve the speed.
III. Flower Edition
1, the pressure between the water roller and the printing plate is too large, which aggravates the friction damage of the mask layer and causes the flower plate.
Solution: adjust the pressure.
2. The supply of plate embellishing solution is too large to cause fancy plate.
Solution: By adjusting the rotation angle of bucket roll or reducing the speed of bucket roll, the pattern can be avoided.
3. Great acidity of the embossing solution will destroy the appearance of the printing plate and cause problems of the printing plate.
Treatment method: Flushing water volume concentration, reduce its pH value. The pH value of the general PS edition should be between 5 and 5.5.
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