5. Pinhole
Phenomenon: tiny holes appear on the prints, especially in the larger area of ​​the pattern.
Reasons: First, when it is printed, the ink becomes a very thin transparent layer, and it can see the Internet lines of the printing roller. The printed products are pinholes (blisters) of the same size and evenly spread over the prints. This is called a mechanical pinhole. The second is the result of ink leveling and poor wettability of the substrate. Impressive pinholes on chemical products are called chemical pinholes.
Treatment method: The mechanical pinholes can be increased by appropriately increasing the viscosity of the ink or drying the ink slowly. For chemical pinholes, adjust the ink pair and do not remove the ink too short to ensure the adhesion and leveling of the ink. Therefore, it can be corrected by adding polyamide resin oil or other moisturizing substances at the same time when diluting.
Phenomenon: tiny holes appear on the prints, especially in the larger area of ​​the pattern.
Reasons: First, when it is printed, the ink becomes a very thin transparent layer, and it can see the Internet lines of the printing roller. The printed products are pinholes (blisters) of the same size and evenly spread over the prints. This is called a mechanical pinhole. The second is the result of ink leveling and poor wettability of the substrate. Impressive pinholes on chemical products are called chemical pinholes.
Treatment method: The mechanical pinholes can be increased by appropriately increasing the viscosity of the ink or drying the ink slowly. For chemical pinholes, adjust the ink pair and do not remove the ink too short to ensure the adhesion and leveling of the ink. Therefore, it can be corrected by adding polyamide resin oil or other moisturizing substances at the same time when diluting.
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