What is the main advantage of using dual-purpose penetrants?

The main advantage of using dual-purpose penetrants is that they can be viewed in both normal and ultraviolet (UV) light. This feature significantly enhances the interpretability of the results during liquid penetrant testing. By being able to inspect parts under both lighting conditions, you can detect indications more effectively and ensure that flaws are not missed. In normal light, the penetrants will appear visible, while under UV light, the fluorescent properties allow for a clearer contrast of indications against the surface, making it easier to locate and identify defects.

The ability to use dual-purpose penetrants in varied lighting conditions provides flexibility in inspection practices and can enhance detection capabilities, thereby improving the overall reliability of the nondestructive testing process.