Coarse Profile Test Ex Tape (0.8 - 2.5 mils)

Testex Press O Film Replica Tape consists of a layer of compressible foam affixed to an incompressible polyester substrate of highly uniform thickness.

When pressed against a roughened steel surface, the foam collapses and forms an impression of the surface.

Placing the compressed Testex tape between the anvils of a micrometric thickness gauge such as the PosiTector RTR H Replica Tape Reader and subtracting the contribution of the incompressible substrate gives a measure of the surface profile.