In the food industry, the businessman in addition to guarantee the quality of the food, you also need to let consumers know that the food production and quality date, so as not to consumers eat has expired food So, carbon with bar code printer also has the pivotal status in the food industry Carbon with bar code printer is mainly used in drinks beer Mineral water and so on the food industry, medical supplies and at the same time to wire and cable non-staple food industry such as cigarette battery extends In addition to its use for the label production date of the food, also can be a potential problem for packing food tracking, to avoid other manufacturers to pretend to be the carbon with barcode printers in the packaging still accounts for a great proportion in the food industry.