Used for the non-destructive testing (NDT) of materials to detect surface cracks and other flaws like porosity, lack of fusion, or open cavities, especially in welds, castings, and forged parts. Crick 110 is a solvent cleaner for surface preparation, Crick 120 is a red penetrant that flows into cracks, and Crick 130 is a white developer that makes the red penetrant visible, revealing the cracks as red spots on a white background