Liquid Dye Penetrant Inspection System Will locate surface discontinuities or other indications on all non porousmaterials Plastics, Ceramics) Cracks, Seams, Porosity, Laps, Laminations, Cold Shuts, (Metals, Used to detect welding, casting and forging defects, cracks and leaks in new - components and fatigue cracks on in - service components.