Dye Penetrant Testing (PT) is based on the properties of capillary action or the phenomenon of a liquid rising or climbing when confined to a small opening due to surface wetting property of the liquid. Dye Penetrant Testing is used for finding surface breaking discontinuities on relatively smooth, non-porous surfaces. Used on a wide range of material types, Large areas or large volume of parts/materials can be inspected rapidly and at low cost. Part with complex geometries can be inspected easily. Indications are produced directly on the surface of the part providing a visual image of the anomaly. Aerosol spray can make equipment very portable.