n Test for brittleness, toughness and tendency to ribbon, by cutting a narrow strip of the coating from the test panel, with a knife. It is not recommended as a test for adhesion, as other methods are more accurate. (Weldon DG (2001) Failure analysis of paints and coatings. Wiley, New York; Paint and coating testing manual (Gardner-Sward handbook) MNL 17, 14th edn. ASTM, Conshohocken, PA, 1995).