Fixation unit for use in a printing system

A printing system comprising:

• a printing module;
• a substrate transport device arranged for transporting a print substrate through the printing system;
• a drying module;
• and
• a fixation module arranged downstream of the printing module, the drying module being arranged downstream of the printing module and upstream of the fixation module, the fixation module comprising a fixation unit, the fixation unit comprising:
• a substantially closed box for enclosing a heated space, the substantially closed box comprising an entry opening and an exit opening for enabling transport of the print substrate through the substantially closed box;
• a heating element arranged for heating the heated space enclosed by the substantially closed box;
• and
• a transport mechanism for engaging a sheet of the print substrate from the entry opening to the exit opening of the substantially closed box,
• wherein the transport mechanism comprises a nip of two belts that are pressed together and run concurrently at substantially the same speed and in the same direction, the belts being impermeable to any ink component.