The working principle of the ink cartridge is mainly to accurately spray ink onto the printing material through the internal ink jet head, thus forming the required image or text. This process involves several key steps:

Ink cartridges usually contain tiny nozzles, which are very fine and can control the position and quantity of ink ejection.
In inkjet printers, ink cartridges are also divided into different colors (such as black, cyan, magenta and yellow) to support color printing.
The printer controls the inkjet head to eject ink at a specific position on the paper by receiving instructions from the computer. This usually involves accurately controlling the opening and closing of each nozzle, as well as the amount and speed of ink ejection.
Some advanced ink cartridges are also equipped with heating resistors. When current passes through, these resistors will heat up in a very short time and generate bubbles, which will then push the ink out. This way can further improve the printing accuracy and speed.
This precise inkjet technology enables inkjet printers to create high-resolution images and texts, which are suitable for various printing needs, including documents, photos and graphics.