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3. Place the scraper on the surface of the gauge behind the material. Use both hands to hold the scraper.
4. Pull the scraper along the length of the gauge at a constant speed. Stop at a point beyond the zero
depth.
5. Leave the sample to dry; monitor the physical characteristics of the material during and after the drying
process.
Drying time: To determine drying time as a function of film thickness, simply press a fingernail into the paint
film and look for evidence of permanent indentation left by the fingernail.
Shrinkage: Examine the behaviour of the material during and after drying to determine shrinkage
characteristics as a function of film thickness.
Fissures and porosity: Check for fissures, craters and pores on the surface of the material to determine
the maximum thickness of wet film which can be applied in one operation.
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