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Flower version
(1) Too much water supply can be solved by reducing the water bucket roll angle or reducing the water bucket roll speed.
(2) Excessive amount of water in the water velvet makes the water roll run under the condition of suspending the water, in order to consume too much water absorbed by the water velvet, or scrape off excess water in the water velvet with a squeegee.
(3) Ink emulsification serious Replace the ink with a try.
(4) Excessive pressure between the water roller and the plate reduces the pressure of the water roller.
(5) The pressure between the ink roller and the plate is too small. Increase the pressure of the ink roller.
(6) Long copying time The problem from printing plates must be completely solved by changing the printing plate.
2. paste version
(1) Insufficient water supply You can increase the amount of water by increasing the water fountain roller rotation angle or increasing the rotation speed.
(2) There is less water in the bucket, resulting in insufficient water supply This type of failure is most likely to occur when water is added manually. The solution is: add water to the bucket to ensure adequate water supply.
(3) The water roller or the water roller has serious abrasion of the water-laminated rubber, causing a poor appearance in Sheung Shui. In this case, it is necessary to replace the water-glue.
(4) The surface of the roller is covered with oil and other oily impurities. The repelling of the ink will cause no water to be transferred. Scrub the roller.
(5) There are too many inks on the surface of the water velvet or string water roller, resulting in water transmission failure. After cleaning the water velvet or string water roller, the problem will be solved.
(6) The pressure between the water rollers or the pressure between the water roller and the plate is insufficient. Try to adjust the pressure.
(7) The pressure between the ink roller and plate is too high.
(8) Too much ink needs to reduce the ink supply.
(9) When the ink roller is closed too early, it should be filled with water and ink.
(10) The surface of the plate is exposed, causing poor hydrophilicity. The plate must be replaced.
In addition to the printing version and the paste version, the printing ink and the paste version are related to the printed version. In the final analysis, the ink and wash ink is not balanced. Practice has proved that: The best state of offset ink and ink balance is to use as little water as possible on the basis of not dirty, except for waterless offset printing. Only by properly understanding the ink-and-wash balance can you print a good product.
Source: "Printing Technology"
Solve the problem of pattern and paste in the process of offset printing
Flower version and paste version are one of the most common failures of offset printing. Finding and resolving problems in a timely manner is an inevitable way to improve the quality of printed products and reduce the scrap rate. The following is a summary of the common causes of pattern and paste, and the corresponding solutions are provided for your reference.