What kind of lighting is typically preferred during MPT?

During Magnetic Particle Testing (MPT), ultraviolet or white light is typically preferred because it enhances the visibility of the magnetic particles used during the inspection process. Ultraviolet light, in particular, is effective for revealing fluorescent magnetic particles, which can indicate surface and near-surface discontinuities in the material being tested. Fluorescent particles emit a bright glow under UV light, making it easier for inspectors to detect indications.

While white light can be used in combination with magnetic particle testing, its effectiveness is generally lower than that of ultraviolet light when it comes to fluorescent materials. Proper lighting conditions are crucial for ensuring that inspectors can accurately assess the material and identify any defects, making ultraviolet light a standard choice in many MPT procedures.