9030/000 Test Pen

The Test Pen is an invaluable tool for testing surface tension on any ...non-porous or non-absorbent material (except wood)—an indicator of its wetting properties. To benefit from optimal adhesion, a minimum surface tension of 38 mN/m is recommended in order to g...lue Swarovski crystals. Best results are obtained when the material to which the crystals are to be glued is randomly tested throughout the process. Pollutants such as grease or oil will contaminate the pen and compromise its reliability, so ensure that surfaces are clean.

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