What is the purpose of ASTM E2501?

The purpose of ASTM E2501 is to establish a standard for violet-light flashlight inspections. This standard focuses on the use of ultraviolet (UV) light to inspect surfaces for the presence of residual contamination, particularly during the evaluation of painted surfaces or other surface coatings. The violet light can help to reveal substances that are otherwise invisible under normal lighting conditions, thus supporting inspectors in ensuring that surfaces are properly prepared and cleaned before the application of coatings.

Understanding this standard is essential in paint inspection, as proper surface preparation is critical for ensuring the adhesion and performance of coating systems. This makes the use of violet light an important tool in the inspection process to achieve high-quality results.