[header] How to inspect parts using dye penetrant [title] Clean the part thoroughly using a suitable cleaner, acetone, aqueous degreasing, etc. [step] Allow the part to dry. Drying can occur using a hair-dryer or in air.
If air-dried, allow enough time for the cleaning agent to evaporate from the defects. This may take several hours depending on the ambient temperature and cleaning material used on the part.