In the thermal transfer printing mode, the working principle of bar code printer is to use the thermal transfer carbon tape as a medium to print to the label printing medium. Computer control bar code printer printing hair heat, heat transfer carbon ink coating in the heat of printing hair heat and print head pressure, melting and transfer to the label printing medium, showing the graphics and text to print. Labels printed by thermal transfer printing can be preserved for a longer time according to the material of the label and the material of the carbon belt. For example, PET durability labels printed by resin-based carbon belts can usually be preserved for 3-5 years or even longer.
