Causes of Paper Wrinkling in Offset Printing        In the packaging and printing industry, a variety of offset printing technologies are often used.Causes of Paper Wrinkling in Offset Printing 1.The pressure of the paper pressing wheel of the paper feeding table is uneven       The paper is subjected to axial force during transmission, resulting in the bulging of the middle part of the paper during the positioning of the front gauge and the formation of wrinkles after embossing.Causes of Paper Wrinkling in Offset Printing 2. The gripping force of the paper gripper row of the embossing cylinder is different         If the holding force on both sides of the paper holding tooth row of the embossing cylinder is insufficient, the trailing tip of the paper will wrinkle; If the gripping force on one side is insufficient, the corresponding trailing edge is wrinkled; If the gripping force in the middle is insufficient, the middle part of the paper will wrinkle.Causes of Paper Wrinkling in Offs […]

Color Matching in Actual Printing        In the packaging and printing industry, in the actual printing, we often encounter the problem of color matching. If we do not understand the performance of ink and the basic knowledge of color, it is difficult to achieve the expected effect.Color Matching in Actual Printing     White ink, gray ink and black ink have no hue, only saturation. The addition of white ink to any color ink will increase the luster and brightness of the ink, and reduce the color at the same time. If black ink is added, it will make the ink shiny and gray. See the following figure for the change:Color Matching in Actual Printing           Note that the ink shall be measured by balance or electronic scale, and the sample shall be scraped with an ink scraping stick. When the ink is adjusted, the proportion shall be recorded and archived to ensure the consistency of the ink color next time.Color Matching in Actual Printing         First of all, we shoul […]

Mainly for the size of the substrate, printing ink with small paper flexibility first is conducive to registration.Different printing color order will affect the final tone, which generally depends on the characteristics of the printed matter.Color Sequence and Overprint Efficiency of Newspaper Printing Large area post printing, unless the ink used has high opacity, because the transfer ability of the ink on the paper surface is much better than that on the ink film. If a small area is printed first and then a large area is printed, the overprint part is directly printed on the paper for a small area, and the ink transfer is good, so the overprint effect is good.Color Sequence and Overprint Efficiency of Newspaper Printing On the contrary, if you print a large area first and then a small area, although the large area transfer is good, for a small area, the printing ink is all stacked on another color (large area) ink film, and the color performance is poor. For the overall effect, it is not as good as the former.Color Sequence and Overprint Efficiency of Newspaper Printing

The thixotropy of the printing screen plate is required to be slightly larger, while the thixotropy of the printing ink of the large-area field plate should be slightly smaller, so as to better improve the printing quality.Solution of Discoloration in Gold Silver Ink Printing To sum up, ink thixotropy has a certain impact on printing, and there are many factors affecting ink thixotropy. Therefore, it is of great significance to correctly understand the thixotropy of ink and its related factors, take corresponding process and technical measures for appropriate control during printing, and keep the ink in a relatively stable state in the printing process, so as to effectively avoid the disadvantages of printing quality, and improve the printing efficiency and product printing quality.Solution of Discoloration in Gold Silver Ink Printing