There are also many factors that cause the color difference between the left and right of the printed product. For example, the pressure of the left and right rubber rollers is uneven, the left and right scrapers are not leveled, and the pressure is not uniform between the left and right and the rubber roller. Here we mainly discuss how to determine the plate problem and how to eliminate the plate factor.
During the plate-making process, especially when the plate is full, the engraving is easy to change the dot size from left to right. Generally, the normal error of left and right is within 0.3 silk. If the deviation is too large, the left and right color difference will occur. The following methods can be used to eliminate the reasons for plate making:
1. Put the printed matter and the plate-making gravure proof together to observe whether the depth and the lightness are consistent. If they are consistent, it can basically be determined that it is a printing plate problem.
2. The plate roller is turned left and right to re-set the plate. After turning on the machine, observe whether the two prints are in the same shade. If the shades are the same, you can basically determine the plate problem.
3. The biggest feature of the problem of plate making is that it is fixed and no matter how you adjust it, it will remain in place.
For example, in actual work, we have encountered that water stains on the surface of the plate roller can not be cleaned and dried, resulting in water stain-like marks after printing. In this case, use 5% concentration of diluted hydrochloric acid to wipe the water stain If it still can not be processed, you can return to the plate making factory for processing.
Gonfor is a manufacturer in China specialized in flexible packaging more than 35 years. Our Packaging Application including Custom Printed Packaging for Tea Packaging , Coffee Packaging , Pet Food Packaging, Food Packaging , Chocolate Packaging,Cookie packaging, Health Food Packaging, Cereal Packaging , Chemical Packaging, Frozen Food Packaging, Detergent Packaging, Sea Food Packaging, Fruit and vegetable Packaging, Holographic Packaging, Sauce Packaging , and Candy Packaging.
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