What does a color contrast in MPI indication signify?

A color contrast in Magnetic Particle Inspection (MPI) indications is significant as it helps identify the severity and type of defects that may be present within a material. When magnetic particles are attracted to surface or near-surface discontinuities, the variation in color can provide critical information about those flaws. For example, the intensity or brightness of the color may reflect the size or severity of a defect, where a greater contrast could indicate a more serious concern that requires attention.

This capability to visually differentiate between types of defects is crucial for inspectors, as it guides them in assessing the integrity of the component being inspected. Thus, the definitive role of color contrast lies in its ability to convey important information about the condition of the material instead of simply measuring inspection accuracy or assessing particle quality or magnetization levels.