An excellent water supply system for fast plate clamping and ink supply is designed. The water supply system includes 14 ink rollers with 3 ink rollers and 5 water rollers with 2 water rollers to ensure the high-precision printing quality required by printing.

Fsd47 (II) - NP and fsd56 (II) - NP can be modified into fsd47 (II) s-np and fsd56 (II) s-np by adding two-color heads. The two-color heads can be freely connected and separated with the host part along the guide rail, which is simple and convenient.

It can effectively realize the one-time completion of two-color bill with red, coding and indentation, and improve the work efficiency.