Use DP-40 to locate cracks, laps, pores, lack of bonding, and similar surface flaws in any insoluble, nonporous substance including both ferrous and nonferrous metals, ceramics, glass and many plastics. Referred to as the “visible dye penetrant” method or “color contrast” method inspection.
Penetrant System Category
Visible – Type 2 Solvent Removable (Method C)
Post-Emulsifiable (Methods B&D)
QPL SAE AMS 2644 Method Method B, Method D, Method C
ASTM E165, E1417