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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1003 |
Payne cup, nominal mass 50 g, 10 cm² |
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1003/3 |
Set of 3 Payne cups 1003 |
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1003A |
Payne cup, nominal mass 250 g,25 cm² - ASTM |
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1003A/3 |
Set of 3 Payne cups 1003A - ASTM |
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