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What is the effect of the state of the scraper on the color difference during the printing process of the eight-side sealing bag?

What is the effect of the state of the scraper on the color difference during the printing process of the eight-side sealing bag?The contact position between the scraper and the plate roller in the eight-side sealing bag printing machine determines the distance between the contact point of the blade and the printing point. The length of the distance should be adjusted according to the printing speed, ink viscosity, mesh depth, and layout quality. In general, the longer the distance, the more dry the ink within the mesh, and the lower the transfer rate of the ink. As far as its influence on the printing effect is concerned, it is equivalent to the partial fade of the ink color. At the same time, the longer distance is also a test for the printing suitability of the eight-side sealing bag. On the contrary, when the distance is short, the transfer rate of the ink is relatively high, and at the same time, some fine lines on the layout are transferred to the printing material.The contact angle of the scraper in the eight-side sealing bag printing machine is the angle between the tangent of the contact point between the scraper blade and the plate roller and the scraping horse. By increasing the contact angle, it is easy to scrape the ink on the layout to make the pictures and texts clear, but it may also cause the phenomenon that the ink layer is too thin, the gloss of the eight-sided sealing bag printing ink is poor, and it is easy to damage the plate roller. On the contrary, if the contact angle is reduced, the printing ink layer becomes thicker and the printed matter is glossy, but the edges and corners of pictures and texts are easily blurred. Therefore, the pressure of the scraper also has a certain influence on the ink color. When the pressure increases, the printing color of the eight-sided sealing bag will become lighter; when the pressure becomes smaller, the ink color of the printed product tends to become darker.

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