John, The way we determine dry film resist adhesion after developing is with a cross hatch test of the exposed resist followed by a tape test. The method is ASTM Designation: D 3359-87. The tool for the cross hatch is from Paul Gardner company (305-946-9454). The results depend on the characteristics of the resist being tested. Some resists chip off more than others in the cross hatched area. It depends what you are looking for from your selected resist. Ken Bridges - Dynachem