The so-called color matching is to combine two or more colors, or use a small amount of colors in addition to the main color to form a color combination. When mixing color inks before use, first expose the colors to be prepared on the color sample separately, and correctly identify whether the color of the original (or original) is the primary color, secondary color, or secondary color. If it is a secondary color or a secondary color, you need to distinguish the proportion of the main color and the auxiliary color. Secondly, the sample must be debugged according to the color indicated by the original. When the color difference is smaller or equal to the original, it can be mixed in large quantities. The time should be short and the amount should be appropriate. Adjusting too little will result in work stoppages and inconsistent ink hues, affecting normal production; too much will cause unnecessary waste. Ink adjustment is usually done in a place where the light is stable or where the light is not directly irradiated.

Three points should be paid attention to when mixing screen printing ink: a. When mixing ink, try to add as few inks of different colors as possible. The fewer types of colored inks, the better the mixing effect. b. Adopt the "from light to dark" principle, no matter when preparing light-colored or bright-colored ink, when the hue is close to the sample, be careful. It is best not to mix inks produced by different manufacturers. Try to use inks of different colors from the same manufacturer for color mixing. Otherwise, uneven tones will occur. In severe cases, agglomeration will occur and the ink will be scrapped. c. Some screen printing inks are dried by drying. Light colors are lighter than undried ones, and dark colors are darker after drying. In addition, whether the color tone of the ink is different before and after drying during printing is an issue that is easily overlooked. Generally speaking, through natural drying (solvent volatile ink), the color will not change if the substrate is plastic, metal, paper, glass, etc.; but if it is a color material for ceramics, the color will not develop until it is burned and oxidized. , the color can only be adjusted based on experience. For screen printing inks that are dried by heat setting or light setting, the color changes in shades, as mentioned above. When the amount of ink adjustment is large, an ink adjustment machine can be used to complete the color adjustment in a short time.

The preparation of light-colored ink is generally based on white ink, mixed with appropriate color ink. For example, light blue, mainly white ink, with a little bit of blue (cyan); light red, mainly white ink, with a little bit of red; gray, mainly white ink, with a little bit of black; silver gray, mainly white ink, with a little bit of black Add silver powder paste and a trace amount of black ink. When preparing light-colored screen printing ink (printing material), add as little white ink as possible, because white ink is highly active and can easily cause discoloration of other colors.

To adjust the ink well, silk screen workers must do the following: a. Understand the various specifications and properties of inks; make the inks suitable for production needs. b. Master the basic knowledge of color science and use it freely in ink mixing. c. Analyze the printing colors and process technology to find out the color sequence of multiple colors to avoid incorrect color sequences, miscibility of the two colors, and color changes. d. When adjusting ink, pay attention to the brightness of the ink color. If the brightness is high, use the original color as much as possible. Otherwise, the ink will be "grey" and the original color brightness will be reduced.