The curing degree of the high-drop hologram master recombine machine supply UV ink can be improved from the following aspects:
1) Increase the power of the UV curing lamp: On most substrates, increasing the power of UV curing will enhance the adhesion of UV ink to the substrate. The power of the uv lamps in general high-precision UV flatbed machines is adjusted in multiple levels, usually divided into high, medium and low levels.
2) Reduce the printing speed: While increasing the power of the UV lamp, reducing the printing speed can also enhance the adhesion of UV ink. On UV flatbed inkjet printers, the printing effect can also be improved through one-way printing (rather than back-and-forth printing). However, on substrates that are prone to curling, heating and deceleration can also cause the substrate to curl.
3) Check whether the high-drop hologram master recombine machine supplyUV lamp and its accessories are working properly: If the adhesion on the substrate that is relatively easy to adhere to under normal circumstances decreases, it is necessary to check whether the UV lamp and its accessories are working properly. All UV curing lamps have a certain effective service life (generally around 1000 hours). When the usage time of the UV curing lamp exceeds its service life, as the electrodes of the lamp gradually decompose, deposits form on the inner wall of the lamp tube, the transparency and ultraviolet light transmittance gradually weaken, and the power will drop significantly. In addition, if the reflector of the UV light curing lamp is too dirty, the reflected energy of the UV light curing lamp will be lost (the reflected energy can account for about 50% of the total power of the UV light curing lamp), which will also lead to a decrease in the power of the UV light curing lamp. There are also some printing machines whose UV curing lamp power configuration is unreasonable. To avoid poor ink curing caused by insufficient power of UV curing lamps, it is first necessary to ensure that the UV curing lamps are operating within their effective service life. UV curing lamps that have exceeded their service life should be replaced in a timely manner. And regularly clean the UV light curing lamp to ensure the reflector is clean and reduce the loss of reflected energy.
4) Reduce the thickness of the ink layer in the high-drop hologram master recombine machine supply: Since the adhesion effect is related to the degree of UV ink photocuring, reducing the amount of UV ink will promote the adhesion to the substrate. For instance, during the large-scale printing process, due to excessive ink supply and overly thick ink layers, the surface layer of the ink cures while the bottom layer is not fully cured during UV curing. Once the ink shows a false drying phenomenon, the adhesion between the ink base layer and the surface of the substrate deteriorates, which will cause the ink layer on the surface of the printed matter to fall off due to surface friction during the subsequent processing. When printing large-area solid jobs, it is necessary to strictly control the ink volume. For some spot color printing cases, when preparing the ink, make the color a little darker. This way, during the printing process, the ink can be printed in thin layers, allowing the ink to fully cure and enhancing the firmness of the ink layer.
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