This document establishes a system of designation for processed unfilled polytetrafluoroethylene
(PTFE) products, which can occur in several forms.
The PTFE used to make the semi-finished product is described in ISO 20568-1. The PTFE used to make
the semi-finished product are virgin, reprocessed or recycled resin. The addition of up to 1,5 % by mass
of pigment or colorant can be used