The UV flatbed printer adopts the principle of piezoelectric inkjet printing, which is different from the thermal foaming type, and also different from the principles of silk screen printing, thermal transfer printing, pad printing, etc. It controls the ink through the internal voltage of the head and sprays it on the desired printing surface. material surface. Therefore, there is no need for plate making, film, color registration, and other processes before printing.
Since there is no direct contact with the material, the inkjet prints ink on the surface of the material in the form of air-space inkjet, so the printing range of the material is broadened, and it is no longer limited to one material, such as glass, ceramic tile, acrylic, metal, leather, etc. Materials can be printed on one machine.
The basic colors are C (cyan), M (product), Y (yellow), K (black), plus W (white), in addition to LC light cyan, LK light black, LLK light light black, and Spot color green, silver, and other colors, according to the needs of the actual material printing pattern to match the appropriate color.
The color software used includes photoprint, Montai, RIP, etc. The functions of this three software are similar, and they are all edited before the pattern is printed.
Among them, because of the role of white, two functions are realized. One is the relief effect, using white ink to pile up on the surface of the material to form uneven drops, and then print color on the surface. The other is to print a color pattern on a dark material with a white ink base.
The imaging is dried through the chemical reaction between the photosensitive curing agent in the UV ink and the ultraviolet light waves irradiated by the LED lamp, not the traditional heat baking or natural drying. Due to the short reaction time, the pattern can be solidified within 3 seconds, which shortens the production time of the finished product.
However, due to the matte nature of the UV ink itself, the imaged pattern is dark and not bright enough. In response to this situation, a layer of transparent liquid can be sprayed on the surface of the pattern in the form of UV varnish (varnish) to achieve a highlight effect.