It is suitable for printing labels on the surface of paper, thin cardboards, non-absorbing plastic films and aluminum foils. Types: 1) Type A: can print characters by solid ink and indentation 2) Type B: can print characters by instant-dryness liquid printing ink and indentation 3) Type C: can print characters by indentation Whether adopting solid inker or instant-dryness liquid printing ink, it has a characteristic of instant drying after instant printing and strong adhesive performance. Printing characters by indentation is clear and widely used for objects with any thickness.