What is a key advantage of visible dye penetrants compared to fluorescent penetrants?

Visible dye penetrants have the distinct advantage of not requiring special lighting for inspection. This makes them suitable for environments where natural light or standard artificial light is available. Inspectors can easily identify the dye against a contrasting background, which allows for straightforward visual inspection without the need for ultraviolet light sources that are essential for fluorescent penetrants.

While fluorescent penetrants can provide higher sensitivity and detect very small defects effectively, the requirement for specific lighting conditions can limit their usability in certain situations. Therefore, the ease of use of visible dye penetrants, due to their accessibility in various lighting conditions, stands out as a significant advantage in many inspection scenarios.