Cobb Moisture Absorption Test Ring & Roller
This method for measuring water absorption of sized papers is used all over the world. A dry test piece of suitable paper is placed under the cylinder. The 100ml of water is poured over the test piece.
After a specified time the water is poured off and the test piece is placed on standardized blotting paper. Another blotting paper is placed on top of the test piece and the excess water is removed by means of the roller.
The test piece is then weighed again and the results are calculated and reported as absorption in grams per m2, according to the standard method.