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Payne - Permeability Cup

Payne - Permeability Cup

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Product Description

Payne - Permeability Cup


  • Precision machining ensures exposure area / total film ratio of 0.4:1
  • Exposure surface: 10 cm² or 25 cm²
  • High grade anodized aluminium

This simple instrument allows reliable measurement of permeability to moisture of paints or similar coatings. It consists of aluminium cup, a ring and a screw cap.

After drying, a coated permeable backing material is cut out to form a disc and tightened by the cap/disc assembly onto the cup, containing 5 cm³ of distilled water.

The whole is weighed to 0.1 mg and placed into a dessicator at 38°C. Periodic weighing every 24 hours indicates the loss of water that has permeated through the film. It is recommended to run the test in triplicate, due to film imperfections.


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