Tympan papers/cardboards or Manilla papers are used to protect the counter pressure plate (bed) and the printing materials from damage because of overpressure. They are also called press packing sheets. Underneath this sheet printers can place calibrated paper to fine-tune the pressure of their press.
Cutting jackets are used to prevent damage to the cutting and perforating lines. Underneath the cutting plate the pressure can also be fine-tuned with calibrated papers.
On this page you can find all available tympan sheets en cutting plates.