As to what kind of base paper is used, it is often not unilaterally determined by the carton factory. The use characteristics of the carton (such as the quality of the contents, the length of time used, etc.), the product's transportation conditions, the customer's business philosophy and cost control methods, etc., determine the quality characteristics of the selected base paper.
Some low-end and low-profit products only need to use low-end base paper, so as to reduce production costs and make the production have a certain profit margin, which easily adds a certain degree of difficulty to production. However, as long as the order is received, we have to find ways to solve some problems in the production process due to the quality of the original paper. If the coating quality of the low-grade white paperboard is poor, when printing blue, green flat screen or full version on the ground, it is easy to appear mottling, that is, the lightly coated local paper surface will obviously notice the fibrous structure of the bottom slurry Uniformity of printing ink color.
In this regard, the redundant color set can be used to arrange the first dilution agent in the first group of the printing press, and then print on the surface of the dilution agent, so that the dilution agent can cover the local exposed surface of the white cardboard surface, and can increase the printing ink The gloss and the amount of ink coating are reduced accordingly, so this process is still feasible. There are also white paperboards with poor surface strength. The printing process is prone to dusting, blistering or delamination, which not only affects the printing efficiency, but also affects the printing quality.
In this regard, the solution is to adjust the viscosity of the ink properly and adjust the viscosity of the ink with a flushing agent; second, adjust the appropriate printing pressure and print with the lightest possible printing pressure to reduce the damage of the pressure to the paper strength ; Three is to reduce the speed of the machine properly for printing, reducing the force of the printing ink peeling force on the paper; Fourth, to arrange the printing color sequence reasonably, it should be used as much as possible when printing: first print the small layout and then the large layout; first print the low viscosity The ink with high viscosity is printed after the ink; Fifth, the press sheet is air-pressed, and the excess color set can be used to first press-print or "over-water" the print sheet; Six is ​​to adjust the white paperboard with poor printing surface strength Printing, such as the liquid ink viscosity of flexo printing is lower than that of offset printing and embossing printing, can be adjusted to use flexo printing process, or adjusted for products with small printing area, through this process arrangement, the cardboard is better prevented from appearing Powder falling, blistering or delamination.
Carbon Sponge for Household Cleaning , Make Our Lives Greener and Healthier
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