Drying Time Recorder

A reliable apparatus to test the drying time or gelation behaviour of many paints and coatings, applied onto a glass strip of 300 x 25 mm (12” x 1”) by means of our cube applicator. Hemispherical needles travel on these test tracks, over a selected time: 6, 12 or 24 h. The drying time stages can be easily assessed with the graduation scale (according to traverse speed configuration):

1. Evaporation of solvent: deep pear-shaped impression
2. Sol-gel transition: continuous track
3. Surface dry: interrupted track
4. Final dry time, the needle no longer penetrates the film. more

Payne - Permeability Cup

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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