Testex® - PRESS-O-FILM HT - Quick Start Instructions Inch
Testex® - PRESS-O-FILM HT - Quick Start Instructions Inch
Testex® - PRESS-O-FILM HT - Quick Start Instructions Inch
Units used in these instructions are thousandths of an inch (mils). Secondary units are micrometers (μm).
A: For measurement with Coarse & X-Coarse grades of tape, target roughness should be in the range
0.8 to 4.5 mils (20 to 115 μm).
B: To measure the tape you will need a gage specifically designed for use with replica tape.
Pre-set the gage to minus 2.0 mils (minus 50 μm). On a standard Testex gage this is equivalent to pre-
setting the gage to 8.0 mils (150 μm). Pre-setting has the effect of automatically subtracting the thickness
of the incompressible layer.
C: Separate a piece of tape from its release paper and place on surface to be measured.
D: Firmly and completely compress replica film against the surface to be measured using an approved
rubbing tool.
F: If a measurement made with either Coarse or X-Coarse grade tape is between 1.5 and 2.5 mils (38
and 64 μm) inclusive, take a 2nd measurement at the same spot with the OTHER grade.
If BOTH readings are in the above range, record the average of the two measurements as the (peak-
to-valley) roughness.
Testex
PO Box 876
Newark, DE 19715
USA
Ph: 302-731-5693
Fax: 302-455-0915
www.testextape.com