How to adjust the color of screen printing ink?

The so-called color matching means that two or more colors, or a small number of colors except the main color matching, are adjacent to form a color combination. When preparing color ink before use, first expose the color to be prepared on the color sample, and correctly distinguish whether the original (or original) color is primary color, intermediate color or composite color. If it is an intermediate color or a composite color, it is necessary to distinguish the proportion of the main color and the auxiliary color. Secondly, the sample must be debugged according to the tone indicated in the manuscript. When the color difference is smaller or equal to the manuscript, it can be deployed in large quantities, with short time and appropriate adjustment. Too little adjustment, resulting in downtime, different ink colors, affecting normal production; Too much will cause unnecessary waste. Ink mixing is usually carried out in places where light is stable or not directly illuminated.

Three points should be paid attention to when preparing screen printing ink: a. When preparing ink, add as little ink of different colors as possible. The fewer kinds of color inks, the better the mixing effect. B adopts the principle of "from shallow to deep", and be careful when the hue of light or bright ink is close to the sample. It is best not to mix the inks produced by different manufacturers, and try to use the inks of different colors from the same manufacturer for color matching, otherwise it will cause uneven color tone, which will lead to condensation in serious cases and make the ink scrapped. C. Some screen printing inks are dried by drying. Light color is lighter than undried color after drying, and dark color is darker after drying. In addition, it is easy to ignore whether the color tone of ink is different before and after drying in printing. Generally speaking, through natural drying (solvent volatile ink), the substrate is plastic, metal, paper, glass and so on. , and the color will not change; But if it is a pigment for ceramics, because it is colored after combustion and oxidation, it can only be colored by experience. As mentioned above, the color of screen printing ink dried by thermosetting and photocuring changes deeply. When the ink mixing amount is large, the ink mixing machine can be used to complete the color mixing in a short time.

Usually, light-colored inks are mainly prepared in Bai Mo, and matched with appropriate color inks. Such as light blue, mainly Bai Mo, slightly blue (cyan); Light red, mainly in Bai Mo, slightly more red; Gray, mainly Bai Mo, slightly black; Silver gray, mainly Bai Mo, with a small amount of silver paste and a small amount of black ink. When preparing light-colored silk-screen printing ink (printing material), Bai Mo should be added as little as possible, because Bai Mo is lively and easily causes other colors to change color.

In order to adjust the ink well, screen printing workers must: a. understand the specifications and properties of the ink; So that the prepared ink is suitable for production needs. B master the basic knowledge of chromatics and use it freely in ink mixing. C. Analyze the printing color and process technology, find out the color sequence of multiple sets of colors, and avoid the color sequence being wrong, and the colors will change when the two colors are mixed together. D. Pay attention to the lightness of ink color when mixing ink. It is required to use primary colors as much as possible in the case of high brightness, otherwise the transferred ink will "turn gray" and reduce the brightness of the original color.