How should developing powder be applied during penetrant inspection?

During penetrant inspection, developing powder should be applied evenly to ensure a consistent and thorough coverage of the surface being inspected. This even application is crucial because it creates a uniform background that allows for clear and distinct visibility of any penetrant indications that may emerge from flaws or defects in the material. An uneven application could lead to missed indications or areas that are difficult to interpret, ultimately compromising the reliability of the inspection results.

Even application facilitates the absorption of penetrant within any defects, making them more detectable against the background. This method enhances overall accuracy and effectiveness in identifying any structural issues in the material being evaluated, ensuring that inspections yield reliable and repeatable results.