GMNA GM9071P PDF

1 SCOPE.

This standard specifies the test method to be used for evaluating the adhesion properties of painted metal and plastic before and after environmental testing. This standard describes the cross hatch tape test (Method A) and cross cut tape test (Method B). Paint systems are required to meet the requirements of Method A and/or Method B. Unless otherwise specified, when dry film thickness is greater than 125 pm use cross cut tape test (Method B). If neither Method A nor Method B is usable due to size and/or shape constraints (typically found in small parts) the sense of the test shall be utilized.