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Home  >>  Products  >>  Surface Profile  >>  Press-O-Film Surface Profile Gauge

Press-O-Film® Testex Tape and Dial Thickness Gauge

Thickness Gauge With Special Modified Anvil and Testex Tape - A modern, fast method of measuring surface profiles on blasted surfaces such as sand blast, shot blast or grit blast.

Press-O-Film Testex replica tape can be used with a gauge to measure the surface roughness (“profile”) of blast-cleaned steel in the roughness range 0.8 to 4.5 mils (or 20 to 115 micrometers).

Because inspectors, as a rule, have a target profile in mind, it is always best to start measurements with the grade of tape that has the target profile closest to the center of its range. Each grade of replica tape is most accurate near the center of its specified range.

Dial Gauge shown with Anvil.

Press-O-Film® Analog Dial Thickness Gauge


Features for Testex Tape

Testex XC Press-O-Film consists of 2 mils (50 microns) of mylar with a coating of approximately 5 mils (127 microns) of compressible film. The compressible film can vary in thickness between approximately 5 and 6 mils (127 and 152 microns) but this variation does not affect the accuracy of the measurement. The tape is rated to read profiles and 1.5 to 4.5 mils (40 to 115 microns).

Each roll of tape is labeled with a manufacturing code and date for tracking purposes. The tape does not expire and will last for years if kept in a relatively clean, dry environment. Temperatures above 120°F (50°C) will degrade the sticky tapes that hold the Press-O-Film. Temperatures above 140°F (60°C) will degrade the actual Press-O-Film. Petroleum products will degrade the Press-O-Film and should be kept away from the tape.

Always confirm measurements near the ends of a given grade’s range using the next higher or lower grade of tape.

Press-O-Film Tape is also used with the Positector RTR - Replica Tape Reader

Testex Press-O-Film Tape

Technical Data

Technical Data
Range When Used With Gage
Medium: 5 to 75 microinch / 0.1 to 2 microns
Coarse Minus: 0.5 to 1.0 mils / 12 to 25 microns
Coarse: 0.8 to 2.5 mils / 20 to 64 microns
X-Coarse: 1.5 to 4.5 mils / 40 to 115 microns
X-Coarse Plus: 4.6 to 5.0 mils / 116 to 147 microns

Instructions for Use

  1. Locate a representative surface site.
  2. Select grade of Press-O-Film - 0.8 to 2.5 mils use “Coarse”, 1.5 to 4.5 mils use “X-Coarse”.
  3. Prepare snap gage, clean anvils, adjust dial gauge to read a minus 2 mils (8 mils when anvils are shut.)
  4. Peel Press-O-Film from slide.
  5. Check unexposed film with gage. Film may vary in thickness and maximum limits of profiles cannot exceed thickness of film coating.
  6. Apply film on blasted surface.
  7. Rub burnishing tool over the round cut-out portion of Press-O-Film. Press-O-Film will become darker when replicated, so make sure that the entire circular area has uniformly darkened.
  8. Remove replica and place between anvils on snap gauge, making sure replica is centered in between anvils. Gauge reading is the average maximum peak to valley heights of the blasted surface. (When snap gage is adjusted as per Step 3).
Press-O-Film® Testex Tape Diagram

Testex Demo Video



Prices subject to change    Prices listed in US dollars for domestic shipments within US    For tax exempt orders please call us at 954-946-9454
Item Number Item Prices

Press-O-Film Kit - 1 Dial Thickness Gauge, 1 Burnishing Tool, 1 Training Surface, 1 Roll Coarse Press-O-Film Tape, 1 Roll X-Coarse Press-O-Film Testex Tape, Instructions

SU-POFK Press-O-Film Kit
Gage Only
SU-POFG Dial Thickness Gauge ONLY (inch)
Replacement Tape
SU-POFM Medium Press-O-Film Testex Tape, 50 Impressions, 5 to 75 Microinch Range
SU-POFC Coarse Press-O-Film Testex Tape, 50 Impressions, 0.8 to 2.5 Mil Range
SU-POFCM Coarse Minus Press-O-Film Testex Tape, 50 Impressions, 0.5 to 1.0 Mil Range
SU-POFX X-Coarse Press-O-Film Testex Tape, 50 Impressions, 1.5 to 4.5 Mil Range
SU-POFXP X-Coarse Plus Press-O-Film Testex Tape, 50 Impressions, 4.6 to 5.0 Mil Range
SU-POFGMU Dial Thickness Gauge ONLY (metric) 229.00
SU-POFTT Training Surface Tool, for use with X-Course 20.00
Certification for gauges is available. Please call for pricing.


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