Printing system

A printing system comprising a flexographic printing machine comprising at least one impression cylinder, on which a material in sheet form to be printed is wound and around which at least one printing station is arranged which comprises:

• a respective plate cylinder, which can be positioned in contact with the material in sheet form to be printed and bears, on a lateral surface thereof, a respective graphic element, and
• a respective anilox roller, designed to transfer ink onto the lateral surface of the plate cylinder,
• downstream of said at least one printing station , along a direction of advancement of the material in sheet form to be printed, there being at least one respective drying unit for the inks applied to the material in sheet form to be printed, said drying unit being adapted to emit at least one first air flow in a direction of the material in sheet form and to aspirate at least one second air flow from the material in sheet form,
• further comprising acquisition means for acquiring a coverage value of the graphic element present on the plate cylinder of said at least one printing station and means for automatically adjusting a flow rate of said zo first air flow and of said second air flow as a function of a coverage value of the graphic element acquired by said acquisition means.