Liquid Penetrant Testing (LPT) is a non-destructive testing method used to detect surface-breaking defects in solid materials. It involves applying a liquid penetrant to the surface of the material, allowing it to seep into any cracks or voids. After a specified dwell time, the excess penetrant is removed, and a developer is applied to draw out the penetrant from the defects, making them visible. This technique is widely used in various industries, including aerospace, automotive, and manufacturing, due to its simplicity and effectiveness. LPT can identify flaws such as cracks, porosity, and laps, ensuring the integrity and safety of components without causing any damage.