This video demonstrates how to do dye penetrant inspection using color-contrast penetrant in visible light.
Clean the part by spraying SKC-S onto the surface. Next, wipe the part dry with a clean cloth.
Apply the penetrant to the test area. Allow the penetrant to dwell for 10-30 minutes. Then, remove the excess penetrant by wiping the part down using a clean dry cloth.
Apply the developer to the test area. Allow the developer to dwell for 10-60 minutes.
Examine the part for any bright, clear indications.