Talking about mirror ink printing skills
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Mirror ink is a special effect ink, which is printed on the transparent material through the reverse side to obtain the best mirror effect on the front side. The mirror silver ink needs special attention in the printing process to achieve a good mirror effect. Below we will explain the use of mirror ink:
1. First of all, it should be understood that the mirror ink is as thin as water. The printing technique is the key. When the printing speed is slow, on the one hand, the water-like mirror ink will leak under the screen. On the other hand, the mirror ink can easily absorb the moisture in the air. The mirror effect obtained is not good. For this reason, in the printing, the mirror ink must be continuously and quickly printed after being poured into the screen to complete the smooth printing, that is, the speed of checking the workpiece while printing, will affect the printing effect. For example, blocking the net, the ink can not be printed, and the slag group on the screen.
2. The ambient temperature and humidity when printing the mirror ink is very important, because the ink is easy to dry on the screen, so it can not be screen printed under air circulation, otherwise it is very easy to block the net. When the air humidity is high, the mirror effect is poor, so When screen printing, avoid air flow and moisture as much as possible.
3, because the ink is as thin as water, so you should choose high mesh screen, not only that, the hardness of the squeegee should be harder, can be more than 80o.
4. The mirror ink must be fully stirred before use, so that the aluminum powder and the resin should be fully mixed evenly to ensure the appearance of the mirror effect. Otherwise, the mirror effect will be affected.
5, the tension of the screen is slightly lower, the mesh distance is also adjusted closer, and the scraping pressure of the scraper is appropriately reduced, otherwise the formation of the mirror effect will be destroyed.
6. When the machine is used, the ink returning knives used cannot be made of hard aluminum or stainless steel, but the colloidal ink returning knives should be used to ensure uniform coating of the screen printed ink, so that the mirror effect is consistent.
7. The mirror effect of the mirror ink is related to the drying method. In terms of the mirror effect, the natural drying is not as good as heating and drying. Note that the heating temperature and the drying time should be the same, otherwise the mirror performance and color saturation will also be There is a difference.