Ultraviolet or UV light is highly advantageous for non-destructive testing methods, particularly in Magnetic Particle Inspection and Dye Penetrant Inspection. The surface to be inspected is coated with some fluorescent powder or liquid and subjected to UV illumination; if any minute cracks or defects exist on the surface, they will be brightened by the light. They may be detected as a glow, indicating problems invisible to the naked eye.
They're much easier for inspectors to find surface cracks without cutting into or damaging the part under consideration, very fast, safe, and very accurate. Particularly critical metal parts within aerospace, automotive, railroad, and manufacturing industries usually require this method-the ultraviolet light.
Modern UV LED black lights make things better; bright, energy-efficient, hassle-free handling. In fact, UV light has a vital role in defect detection concerning safety and quality in industries.
