Payne Permeability Cup
To determine the permeability of film of paints, Varnish etc. Film is gripped between a ring fitted with a seal and the cup which a quantity of water. Then placed into a dessicator at 38⁰C. Periodic weighing every 24 hrs. indicates the loss of water that has permeated through the film.
Standard : ASTM D 1653, ISO 7783