Due to the extremely high surface smoothness of gold cardboard, it is prone to smear problems during printing. The following methods can be used in actual production.
1 Achieve quick drying of ink
1) Add appropriate desiccant to the ink to allow the ink to quickly form a film on the paper surface.
2) Printing with POP ink.
3) Add infrared drying or UV drying device.
4) Increase the distance between the take-up roller and the take-up table to increase the ink drying time.
5) Reasonably control the temperature and humidity of the environment, and print in relatively dry and high temperature weather.
6) In the water-ink balance, the amount of fountain solution should be kept to a minimum.
7) Reasonably control the pH value of fountain solution, not too low, otherwise it will inhibit the drying of the ink.
8) Correctly adjust the moisture content of the paper.
9) Under the premise of ensuring the printing quality, reduce the film thickness appropriately.
10) In the pre-press plate-making stage, the gray component is often used to replace the process to reduce the overprinting of color inks. [next]
2 Reduce the viscosity of the ink
1) After the temperature of the ink increases, the viscosity will decrease and the viscosity will increase, making it easy to stick. You can add debonding agent to try.
2) Add anti-sticking cloth to the take-up roller.
3) Add anti-sticking agent (substance that can reduce the self-adhesive of the rubber or adhesive, reduce the adhesion of the surface and produce a slightly rough surface)
4) Spray powder with small particles and spray it evenly on the surface of the printed sheet to play a role in blocking the dry ink and the previous printed sheet.
3 Reduce the surface tension of the ink or enhance the surface free energy of the paper to increase its mutual adsorption capacity
1) Add silicone oil to reduce the surface tension of the ink without changing other properties of the ink.
2) On the basis of ensuring the quality of the printed products, add more volatile industrial alcohol.
4 Reduce the accumulation of printed sheets to prevent squeezing of the ink in the fixing stage
When printing hundreds of sheets, it is necessary to pile them into a pile of paper to prevent damage to the ink surface due to excessive pressure.
Of course, there are many reasons for the failures in printing, which need to be explored and discussed in practice. If you have any good ideas, please come up with more communication and communication to make progress!
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