Comparison between the most popular film printing

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Comparison between static film printing and inkjet printing

digital printing to meet the requirements of elongation measurement, even if it cannot replace traditional printing in a short time, it will coexist and complement with tradition. Generally, digital printing refers to professional production, printing of commercial prints and color proofing. Under this premise, speed, quality and economy have become the elements to be considered. At present, there are two categories of xerography and inkjet that meet the conditions

static film printing, commonly known as laser, attaches and fixes small particle powder (toner) on paper for imaging. Although different brands have different printing procedures, the principles are similar. After converting the printed data into dots, the biomaterial content of RS nylon 6/10 can reach up to 70%. The dots are scanned by laser light onto a rotating drum. The drum is made of highly light sensitive materials, with positive electrostatic, and the part swept by laser light turns into negative electrostatic. When the drum turns to the powder tank, the powder with positive electrostatic, immediately attaches to the part scanned by laser, That is, for the image to be printed, a piece of paper with negative static electricity appears under the drum, and the strength of the electrode is slightly larger than that of the laser aiming at the drum, so the powder on the drum is sucked onto the paper, heated and fixed, and the printing is completed. In this process, the monochrome goes once and the color goes four times (CMYK four-color powder goes through a roller respectively), but the exception is HP indigo, which uses only one roller to rotate four times. The imaging powder is very small, usually solid powder, and some are installed in the liquid box. HP Indigo is called electroink. First, the liquid is attached to the paper with ink for 5 (1) 0 years, and then it is converted into a solid film. Static film printing digital system, with Canon, Heidelberg, HP indigo, Konica Minolta, OC é, Ricoh, mobile beam automatic interruption of movement (or automatic return to the initial position) Xeikon, Xerox as the main manufacturers

inkjet printing uses small drops of ink to drop onto the paper for combined imaging. The ink drops are very small, only microns. The position of ink dripping depends on the accurate and fine movement of ink-jet head, and multiple ink boxes with different colors are used to print out full-color images. There are two inkjet technologies: dro on demand and continuous inkjet. In the early stage, continuous inkjet was the main method, and the nozzle dripped ink continuously according to a certain law. If it was not necessary to print on paper, it would pop open in the form of static electricity and be recycled to the ink tank. The efficiency of this method is not high. In the later development of on-demand ink dropping technology, the inkjet head drops ink only when it goes to the place where it needs to be printed

there are two control modes of ink dripping; Rely on heat and vibration. Thermal inkjet relies on the heat of a small resistance to evaporate the surrounding ink and produce a bubble. The expansion of the bubble forces the ink to drip out of the nozzle. After dripping, the bubble disappears and new ink is sucked in from the ink tank. This method produces bubbles, commonly known as bubble jet. The technology of dropping ink by vibration is called piezoelectric technology, which is patented by Epson. Put a piezoelectric chip above the inkjet nozzle, add a little current to the chip, generate vibration, and drop the ink by vibration. Although these two on-demand inkjet technologies are widely used, the actual use in production is still mainly vibration, and the bubble type is used in low-end personal printing equipment

inkjet printing equipment mainly drops ink on demand, and the inkjet head can be replaced with standard components. Continuous inkjet inkjet heads are manufactured by printer manufacturers as a whole. They are applied in two fields: Kodak Versamark and Creo iris. The equipment manufacturers that drop ink on demand include Agfa dotrix, durst, Inca digital, Nur, OC é, Scitex vision, vutek, etc. Canon, ENCAD, Epson, HP, Mutoh and other manufacturers Manufacture inkjet printing engines for wide width printing equipment. The on-demand inking technology is flexible. The size of the ink drop is transmitted to the piezoelectric chip by different sound signals to produce different vibrations and produce gray-scale images

the development of digital printing technology of static film printing is slower than that of inkjet technology. At present, monochrome and dual machine printing can reach 1000 pages per minute and color printing can reach 140 pages per minute. It mainly develops to low-cost personal equipment and competes with low-grade inkjet equipment. In the inkjet printing market, it has a place in wide format printing, high-quality color printing and personal printing, but whether it can compete with and replace the mainstream equipment of static film printing, or even compete with traditional printing, further research and development is still needed to improve speed, quality and cost

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