ISO 8296:1987
Plastics — Film and sheeting — Determination of wetting tension
A series of solvent mixtures of gradually increasing surface tension are applied to the surface of the plastic form until a mixture is obtained that just wets the film surface. The wetting tension of the surface under test is approximated by the surface tension of this particular mixture. Any contamination of the film surface and any trace of surface active impurities may affect the wetting tension. Examples of test mixtures for the determination of the wetting tension are given in a table.
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