1 This International Standard describes a method for assessing the natural spreading rate of application of a product (in terms of area per wet film mass or area per wet film volume, as appropriate) when applied by brush to test panels.
2 The method is not suitable for products that contain highly volatile solvents.
NOTE — The results are dependent on the type and nature of the substrate. Although consistent results may be obtained by one operator, care should be taken if results between operators and be-tween laboratories are to be compared. In such circumstances, the use of a common reference product is recommended.