Inkjet printers can be divided into solid and liquid inkjet printers according to their working principles (now and later more common), and liquid inkjet printers can be divided into bubble (canon and hp) and liquid piezoelectric (epson). Bubble jet is a technology that produces bubbles in ink by heating the nozzle and spraying them onto the printing medium.
Similarly, thermal inkjet technology uses a thin-film resistor to heat less than 0.5% of the ink in the spray area to form a bubble. The bubble expands at a very fast speed (less than 10 microseconds), forcing the droplets to spew from the nozzle. The bubble continues to grow for a few microseconds, and then goes back to the resistor. When the bubble is gone, the ink of the nozzle is retracted. Then the surface tension will generate suction, pull the new ink to add to the ink jet area. The thermal sensitive inkjet technology is constructed by such an integrated cycle technology program. In piezoelectric inkjet, ink is ejected from a nozzle similar to that of thermal-inductive inkjet, but droplets are formed by narrowing the area where the ink is ejected. The reduction of the ejection area is controlled by applying voltage to one or more piezoelectric plates in the ejection area. Because the ink is prone to chemical changes and unstable properties at high temperatures, the color authenticity of the printed ink will be affected to a certain extent; on the other hand, because the ink is ejected through bubbles, the direction and size of the ink particles are not easy to grasp, the edges of the printed lines are easy to be uneven, to a certain extent, the impact of the effect. The quality of printing is all its shortcomings. The micro-piezoelectric printing head technology utilizes the characteristics of discharge when the crystal is pressurized to eject ink steadily at room temperature. It has a strong ability to control ink droplets, easy to achieve 1440 DPI high-precision printing quality, and micro-piezoelectric inkjet without heating, the ink will not be heated and biochemical changes, thus greatly reducing the requirements for ink.