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ANSI/TAPPI T 558 om-25
Surface wettability and absorbency of sheeted materials using an automated contact angle tester
This test method measures the contact angle of a test liquid in contact with a film or a paper substrate under specified test conditions. This test method may be used with any liquid of interest which is compatible with the equipment used, particularly with regard to liquid viscosity, tackiness, and vapor pressure (evaporation). This test method may be used with any substrate of interest, which can be cut to dimensions compatible with the equipment used.
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Technical Association of the Pulp and Paper Industry [tappi]