The high contrast between the fluorescent material and the object makes it possible to detect minute traces of penetrant that indicate surface defects. Dye penetrant inspection is similar, except that vividly colored dyes visible under ordinary light are used - Fig 4. Normally, a white developer is used with the dye penetrants that creates a sharply contrasting background to the vivid can itunes convert mp3 to wav
color. The part to be inspected must be clean and dry, because any foreign matter could close the cracks or pinholes and exclude the penetrant. Penetrants can be applied by dipping, spraying or brushing, but sufficient time must be allowed for the liquid to be fully repaif into the discontinuities. This may take 0205 2005 toyota prius repair manual pdf or more in very exacting work.