Digital Printing Machine. The RDM 17S Digital Printing Machine represents a new concept in the field of printing, marking and decorating of products utilising a Computer- to- Product technique by using Rita Pad Printing Systems proprietory developed Digital inkjet technology.The RDM-17S Digital Printing Machine is the right machine to print on Rigid PVC, Conduit pipes, Packing Straps, Caps, Bottles, Pouches, Laminates, Plastics, Tubes, Scales, Dials, Tetra Pack, Cartons, Labels etc. etc.