In the carton printing process, printing deinking is the most common thing. The main cause of printing deinking is the problem of ink and paper. So how to solve the problem of deinking in the production process?
How to solve the deinking problem? Do you have some practical experience? This article attempts to analyze the solution of deinking from the ink and paper.
1. Ink: Pay attention to ink viscosity and wear resistance
The problem of ink viscosity is one of the biggest causes of deinking. The high viscosity of the ink will slow down the drying of the ink. When the ink does not dry quickly, it will easily produce deinking. So reducing ink viscosity is the best way to overcome deinking.
Tips: If the color deviation occurs after the viscosity is reduced, the toner content of the ink can be increased to ensure the correctness and stability of the ink color.
The second is the wear resistance of the ink. The abrasion resistance of the ink is mainly reflected in the cohesion and adhesion of the ink. When the cohesion and adhesion of the ink decreases, the abrasion resistance of the ink becomes poor, which is closely related to the ink itself.
Tips: If the ink has dried after printing, if the ink is wiped by hand or paper, there is a serious deinking phenomenon, it means that the ink has poor abrasion resistance, which requires the addition of abrasion resistance or ink re-making.
2. Paper: low water absorption
If the water absorption of the paper is low, the water absorption of the ink will naturally decrease, and the ink floating on the surface of the paper will easily cause deinking.
Tips: If the paper is known to have poor water absorption, then it is necessary to start improving from the tile line. First, increase the heat of the facial paper. By increasing the heat of the paper, the fiber and the sizing layer of the facial paper are destroyed, thereby improving the ink absorption of the paper, and increasing the amount of ink penetrant used during printing, which can better prevent printing The occurrence of deinking.
In summary, the occurrence of deinking is common, and the cause of each type of deinking is also different. Only when you find the real cause and then seek a suitable method to improve it, the effect will be better.
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