Dusting powder: dusting is a common method used in printing. It is an effective means for back-scratching caused by slow drying of the ink film. When the ink layer is thick, the amount of dusting powder can be appropriately increased, especially for substrates. When the surface has a small area of ​​dark tone or solid ink, more attention should be paid to increasing the amount of dusting. Generally, the amount of powder to be sprayed should be as small as possible in the effective range. Otherwise, the ink color of the printed matter will be affected. In particular, it is necessary to pay attention to controlling the amount of dusting on products that require hot stamping and lamination.
Drying rack: In the printing machine's delivery section adopts a layered approach to take the paper, that is, every 5cm ~ 20cm (the thickness of the separated paper layer can be adjusted according to the density of the substrate and the thickness of the surface ink layer, the density of the substrate When the thickness of the ink layer is large, the separated layer height should be appropriately reduced and layered to prevent the damage of the not yet dried ink film due to the weight of the paper, or the back felting.
Shaking air: Printed products with poor surface absorption and thick ink film are generally dry slowly. Since the stacking of paper and oxygen in the air less interfere with the process of oxidation and drying, the paper is gently shaken to make it breathable at intervals. Increasing the contact between ink and air can effectively accelerate ink drying.
Finally, let's review the key to the slow drying of the ink film on the surface of the control printed matter mentioned in this article, as well as some processing methods for the slow-drying printing of inks:
1. Select the appropriate ink; 2. Use as few additives and auxiliary agents as possible in the printing process; 3. Use dry oil in appropriate amounts; 4. Control the amount of water in the layout and the pH of the fountain solution in printing; Constant temperature and humidity is very important; 6. Control the ink film thickness of the graphic; 7. Spraying, drying, shaking.
Drying rack: In the printing machine's delivery section adopts a layered approach to take the paper, that is, every 5cm ~ 20cm (the thickness of the separated paper layer can be adjusted according to the density of the substrate and the thickness of the surface ink layer, the density of the substrate When the thickness of the ink layer is large, the separated layer height should be appropriately reduced and layered to prevent the damage of the not yet dried ink film due to the weight of the paper, or the back felting.
Shaking air: Printed products with poor surface absorption and thick ink film are generally dry slowly. Since the stacking of paper and oxygen in the air less interfere with the process of oxidation and drying, the paper is gently shaken to make it breathable at intervals. Increasing the contact between ink and air can effectively accelerate ink drying.
Finally, let's review the key to the slow drying of the ink film on the surface of the control printed matter mentioned in this article, as well as some processing methods for the slow-drying printing of inks:
1. Select the appropriate ink; 2. Use as few additives and auxiliary agents as possible in the printing process; 3. Use dry oil in appropriate amounts; 4. Control the amount of water in the layout and the pH of the fountain solution in printing; Constant temperature and humidity is very important; 6. Control the ink film thickness of the graphic; 7. Spraying, drying, shaking.
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