The marking of foils and sheets consists of the PETAFOL trade name, a literal code and a four-digit numerical code.

The first letter denotes the recommended procedure:
T – moulding
V – punching

The second letter denotes the characteristics of appearance:
T – basic type, transparent type
C – coloured type

The third letter (N), if applied, indicates the film is of hygienic quality, intended to come into direct contact with foodstuffs and meals.

The four-digit numerical code is used to distinguish between the versions in a group and the properties of the film types