How Replica Tape Works
- Replica tape consists of a layer of compressible foam affixed to an incompressible polyester substrate.
- When pressed against a roughened (steel) surface, the foam collapses...
- Acquiring an impression of the surface.
- Placing the compressed tape between the anvils of a micrometric thickness gage, and subtracting the contribution of the incompressible substrate (50 micrometers or 0.002 inches), gives a measure of the surface profile.