http://www.zywell.com/thermal-....printer-mechanisms/ inject and laser printer head, thermal printer head operate quietly, use no ink, etc., and are clean and do not require large toner cartridges. For POS (point of sale) receipts such as code labels and retail and fax. Among them, the demand for high-quality and high-speed printing of barcode label printers is increasing, and the market is expanding year by year. For example, medical printers are popular because they are safe to use without ink.