An inkjet printer is a device used to print information on products or packaging, such as production dates, batch numbers, and barcodes. Its design principle is based on inkjet technology, where ink is sprayed onto the product surface through nozzles to create clear print patterns. During operation, the inkjet printer uses high-precision nozzles to spray ink onto the designated positions, with the control system ensuring accuracy and consistency of each print. There are various types of inkjet printers, including continuous inkjet, drop-on-demand inkjet, and laser coders. They are widely used in industries such as food, beverage, pharmaceuticals, and cosmetics, especially in high-efficiency, automated production lines, enabling fast printing of large volumes of products and improving production efficiency while meeting traceability requirements.