Printing skills of mirror ink:
1. First of all, it should be understood that the mirror ink is as thin as water, and the printing technique of real money fraud is the key. When the printing speed is slow, on the one hand, the mirror ink that is as thin as water will leak off the screen, on the other hand, the mirror ink is easy to absorb in the air. In order to print smoothly, the mirror effect obtained after printing is not good. For this reason, when printing, the mirror ink must be printed on the screen continuously and quickly to print smoothly. This speed will bring the printing effect even if the workpiece is checked while printing. For example, blocking of the screen, ink can not be printed, slag formation on the screen, etc.
2. The environmental temperature and humidity when printing mirror ink is very important. Because the ink is easy to dry on the screen, it cannot be screen printed in an environment with large air circulation, otherwise it will be very easy to block the screen and become agar-like gel. At the same time, when the air humidity is high, the mirror effect will be poor. When screen printing, avoid air flow and humidity as much as possible, and the screen printing environment should be strengthened to dehumidify. If the mirror ink is stored at 20°C and silk-screened at 20°C, the printability will be better.
3. Because the ink is as thin as water, a high-mesh screen should be selected. Not only that, the squeegee hardness should be harder, which can be above 80°.
4. The mirror ink must be fully stirred before use, so that the metal powder and resin must be fully mixed evenly to ensure the appearance of the mirror effect, otherwise it will affect the production of the mirror effect.
5. The tension of the screen is slightly lower, the screen distance is also adjusted closer, and the scraping pressure of the squeegee is appropriately reduced, so that the mirror effect can be produced.
6. In mechanical printing, the ink-returning knife used can not be hard aluminum or stainless steel, but a colloidal ink-returning knife should be used to ensure that the mirror ink is coated evenly and the mirror effect is consistent.
7. The mirror effect of mirror ink is related to the drying method. In terms of mirror effect, natural drying is not as good as heating and drying. Note that the heating temperature and drying time should be the same, otherwise the mirror performance and color saturation will also be There is a difference.