Whether the printed product can get the ideal ink color, the quality of the rubber roller is crucial!
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In the traditional printing process, whether the printing product can obtain the ideal ink color, the quality of the rubber roller has a crucial relationship. On the machine for printing color products, there are generally three components: an ink transfer roller, a fountain roller and an ink roller, and the ink roller and the ink roller are greatly affected by the quality of the printing ink.
The quality of the rubber roller is mainly manifested in the aspects of elasticity, viscosity, center of gravity and surface finish. The main effect of the ink color is the viscosity. During the printing process, the rubber roller should maintain a certain viscosity to ensure that the ink applied to the plate is consistent for each printing cycle. However, in the actual production process, the viscosity of the rubber roller is not stable. The reason is: first, due to the increase of paper dust in the ink; second, the tackifier on the surface of the rubber roller (ie, glycerin) will increase with temperature and use. When the time is extended and lost, the viscosity of the surface of the rubber roller is gradually reduced, and the ink absorption performance is also correspondingly decreased, thereby affecting the balance of the ink color of the printed product. Therefore, the printing of color products should use a more stable polyurethane rubber roller. If printing large-scale products, the rubber roller should be cleaned at appropriate time to remove impurities on the rubber roller to ensure the printing quality of the product.