Liquid penetration inspection finds surface-breaking faults by observing the bleed out of a coloured or fluorescent dye from the flaw. The method is based on a liquid’s capacity to be sucked into a fault in a “clean” surface via capillary action. An extra surface penetrant is removed, and a developer is added after a period known as the “dwell.” Acting as a “blotter” makes the imperfection visible; it extracts the penetrant from it. Fluorescent penetrants must be utilised in dimly lit areas with an ultraviolet “black light,” whereas coloured (contrast) penetrants require strong white light. A pre-cleaned component’s surface is treated with a penetrant solution. Capillary motion causes the liquid to be drawn into surface-breaking flaws. The surface is meticulously cleansed of extra penetrant substances. The imprisoned penetrant is drawn back to the surface with the help of a developer, where it spreads out and creates an indication. Compared to the actual defect, the indication is considerably simpler to perceive. ELIGIBILITY CRITERIA FOR ADMISSION The course is designed for all NDT personnel, as well as mechanical engineering and Qc engineering for welding inspection. CERTIFICATION AUTHORITY: • SNT-TC-1A (Latest edition) of American Society for Nondestructive Testing. • CSWIP (As per ISO 9712).