Testex is the manufacturer of Press-O-Film replica tape.
Press-O-Film provides inspectors and researchers a simple way to obtain an impression
of a surface.
P
ress-O-Film (POF) consists of a layer of crushable plastic microfoam coated onto a polyester film of highly
uniform thickness.
When compressed against a roughened material, Press-O-Film
accurately replicates details of it's surface
roughness.
The impression can
be studied in either of two ways:
1) a simple micrometric dial thickness gage can be
used to determine the average maximum peak-to-valley roughness, or
“profile,” of a replicated surface, or,
2) an optical profiling interferometer
or similar device can be used to produce maps of the replica’s
surface topography. This is most appropriate to study of subtle features at
the microinch (25 nanometer)
level.
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