inkjet printing is a pressureless printing method that uses computer control to obtain text and images from a nozzle to a stream of fine ink on a substrate. It integrates multi-disciplinary technologies such as electronics, mechanics, fluids, ultrasound, and microcomputers, and has become one of the high-tech in the field of color printing. In recent years, large-scale outdoor advertising uses inkjet printing technology, which makes the color tone level, definition, color saturation and the like of the advertising pattern reach a near-perfect level.
(1) Composition system of inkjet printing:
The inkjet printing system consists of a system controller, an inkjet controller, a showerhead, a substrate drive mechanism, a substrate, and the like.
The output dots of an inkjet printing system are a key factor in determining print quality. The size of the dots is expressed in dots per inch. Color screen printing is generally 300dpi, 600dpi, 720dpi, 1024dpi, etc. Some large-format advertising posters can be printed with 9~72dpi.
(2) Type of inkjet printer:
Inkjet printers can be divided into two types: continuous inkjet printers and batch inkjet printers.
(3) Color inkjet printing:
The host of a color inkjet printing system receives color information through a variety of different information sources, such as color graphics terminals, color scanners, digital cameras, color word processors, and the like. The information source sends the three primary colors of red, green and blue of the spring light to the printer interface, and stores the information to be copied into the main memory, and then converts the red, green and blue information into cyan and magenta by the color converter. The color separation and screening signals of the yellow and black four-color inks are controlled by the gray controller to control the neutral gray, and the ink signals of the above four colors are respectively sent to the electrodes of the corresponding color nozzles to control the nozzle to eject the ink.