Magnetic Particle Testing (MPT) is a non-destructive testing method used to detect surface and near-surface defects in ferromagnetic materials. The process involves magnetizing the object and applying fine magnetic particles, which can be dry or suspended in a liquid. If there are any cracks or flaws, the particles will gather at these areas, making them visible under ultraviolet light or white light. This technique is widely used in various industries, including aerospace, automotive, and manufacturing, due to its effectiveness in identifying defects that could lead to failure. MPT is valued for its speed, simplicity, and ability to provide immediate results without damaging the tested material.