With the continuous advancement of technology, fully automatic screen printing machines have been widely praised and applied at home and abroad, replacing a large number of manual printing and semi-automatic printing machinery, making the printing operation technology simpler. What should I do if the screen printing ink is dried? It can be convenient for printing personnel Overcome the problem of ink drying during pad printing or screen printing.

    1. The solution to the drying problem is prevention. It is necessary to communicate clearly with the ink supplier before printing. The ink supplier of the screen printing machine understands their products better than the printing master. What kind of printed matter does the ink act on? For example, trademark nameplates, paper Printing on. Even different papers use different inks for printing. For example, the drying of ink on newsprint is completely different from the drying on a type of paper.

    2. Try not to use soybean oil-based ink in the printing process, because soybean oil is a semi-dry (slow) oil, so it is not easy to dry when printing on paper with a dense surface.

    3. The printing environment should control the pH of the fountain solution in the range of 4.0 to 5.0. The higher the acidity (the lower the PH value), the slower the ink drying process.

    4. When printing a large area of solid ground, use a varnish containing desiccant or a transparent size for overprinting.

    5. Use the recommended amount of desiccant for the ink being used. Too much desiccant will plasticize the ink so that it will not dry.

    6. Mixing additional desiccant in the fountain solution can improve the drying performance of the ink. GrafOSiec is an example of an additional desiccant, which can be added in an amount of 1% to 3%.

    7. Make the paper stack lower at the delivery end of the printing press.

    8. Use large particles of dust to help separate the printed paper, and allow more oxygen to enter and react with oil and resin.

    9. Let the supplier increase the strength of the ink so that it can be printed with a thinner ink layer, which can be fixed and dried more easily.

    10. Because the temperature of the printing press or paper may be too low and will delay the ink drying, pre-treat the paper before printing.

    In short, the solution to control the drying speed of screen printing inks is to reach an agreement with the ink supplier, what you want to print, and what kind of ink the other party needs to provide. After choosing the right ink, you can grasp the points that should be paid attention to from the details to prevent the slightest failure. The rate of oxidation can be increased by incorporating more oil or alkyd resin in the catalyst, or by the use of completely dry materials.