The film or paper on which foil is carried in Roll Leaf Hot Stamping. There
are basically six types, namely paper, cellulose, polypropylene, acetate,
polythene and polyester film. These vary in thickness from 12 micron
(most commonly used today) up to 50 micron. The heavier carrier is used
for stamping complicated plastic parts where a thin carrier tends to tear or
distort. Heavy carriers are also used when stamping large areas as this
enables the foil to lay flat on the job, thus facilitating the operation.