Thermal inkjet technology (thermal inkjet technology) uses a thin film resistor to heat less than 0.5% of the ink in the ink ejection area to form a bubble. This bubble expands extremely fast (less than 10 microseconds), forcing the ink droplet out of the nozzle. The bubble continues to grow for a few microseconds before disappearing back onto the resistor. When the bubbles disappear, the ink in the nozzle is retracted. Surface tension then creates a suction force that pulls new ink to replenish the ink ejection area. Thermal induction inkjet technology is framed by such an integrated cycle technology program. In piezoelectric inkjet technology, ink is ejected from a nozzle similar to thermal inkjet technology, but formed by shrinking the area where ink is ejected. The size 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 at high temperature, the directionality and volume of the ink particles are not easy to grasp, and the edges of the printing lines are easy to be uneven, which affects the printing quality to a certain extent. These are its shortcomings. Micro-piezoelectric print head technology uses the characteristics of discharge when the crystal is pressurized, and ejects ink stably at room temperature. It has the characteristics of strong ink drop control ability, easy to achieve 1440dpi high-precision printing quality, and micro piezoelectric inkjet does not need to be heated, and the ink will not undergo chemical changes due to heat, so the requirements for ink are greatly reduced. Liquid inkjet printers represent the mainstream products in the market.

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