How to improve the adhesion of qinghua offset printing ink red on gold and silver cardboard?
Publish Time: 2025-03-11
To improve the adhesion of qinghua offset printing ink red on gold and silver cardboard, you can start from the following aspects:1. Optimize ink selectionChoose ink with strong adaptability: Make sure that the qinghua offset printing ink red used has good adaptability to the surface material of gold and silver cardboard. You can consult the ink supplier and choose ink specially designed for gold and silver cardboard. This type of ink usually has better adhesion and printing effect.Avoid using expired ink: Use fresh, unexpired ink to ensure its stable performance and strong adhesion.2. Adjust the printing processControl the thickness of the ink layer: Too thin an ink layer may cause the adhesive to be destroyed and affect adhesion. Therefore, during the printing process, the viscosity of the ink should be reasonably adjusted, and the thickness of the ink layer should be appropriately increased, but the ink layer should be avoided from being too thick, which will cause brittleness after drying.Ensure that the ink is fully dried: Insufficient heating or slow drying speed may cause the ink to not be completely dried, affecting adhesion. You can increase the heat and air supply, increase the drying power, and ensure that the ink can be fully dried after printing.Pay attention to the order of overprinting: When overprinting, make sure that the lower layer of ink has completely dried before printing the second layer of ink to avoid the formation of false drying and affect the adhesion.3. Treat the surface of the printing materialClean the surface: Make sure that there is no sticky dirt on the surface of the gold and silver cardboard to avoid affecting the adhesion of the ink. You can use an appropriate detergent to clean it and print it after it is thoroughly dried.Increase the surface tension: The surface tension of the gold and silver cardboard should be higher than the surface tension of the ink to ensure that the ink can be evenly attached to the paper surface. If the surface tension of the printing material is lower than the tension of the ink, the surface tension of the printing material can be increased by pre-priming.4. Apply special processing technologyUV glazing protection: For gold and silver cardboard printed with water-based ink, UV glazing oil can be applied after printing to form a protective layer to improve the adhesion and durability of the ink.Use special diluent: When adding solvents to the ink, you can appropriately add some synthetic resins or use special diluents to improve the conjunctival properties of the ink and improve adhesion.5. Quality Control and InspectionStrict quality inspection: During the printing process, the ink adhesion should be monitored in real time to ensure that each batch of printed products meets the quality requirements.Regular equipment maintenance: Keep the printing equipment clean and in good operating condition to avoid the impact of equipment failure on printing quality and ink adhesion.By optimizing ink selection, adjusting printing process, processing the surface of printing materials, applying special processing technology, and strict quality control and inspection, the adhesion of qinghua offset printing ink red on gold and silver cardboard can be effectively improved.
