Press-O-Film replica tape is available in a variety of thicknesses to facilitate
profile measurement in differing ranges.
The primary range
for measurement with replica tape is 0.8 to 4.5 mils (20 to 115 um). Use of
Coarse Minus grade (<0.8 mil or <20 um) or
X-Coarse Plus grade tape (>4.5 mil or >115 um)
should be restricted primarily to checking measurements at the lower and upper
ends of the primary range.