Hot transfers can be used to provide parts with a decorative pattern or
lettering. They consist of a pre-printed transfer film, on which the design
has been applied. A hotplate is used to transfer the color coating from the
film onto the part under pressure.
The difference with the hot stamping process is
that the transfer film already contains the complete design, before it goes
onto the part. In hot stamping, the decorative pattern is in the raised
pattern on the die or the part. Pre-printing the film makes the hot transfer
process relatively expensive compared to hot stamping. Hot transfers are
specially suited to complicated multi-color images.
Hot transfers require a smooth part surface for good adhesion. As in all
decorative processes, the parts should be clean and free of oils, grease and
mold release. Cleaning of the
parts may be necessary before applying the film. The compatibility of the
coating with the part material must be checked, and careful pre-testing is
recommended.
