Table 1-4. Penetrant Procedure (Type I, Method B)
Preparation of Part:
Refer to Preparation of Part of Area for NDI, paragraph 1.4.4.
Refer to TM 1-1500-344-23.
The penetrant may be applied by brushing, spraying, or dipping
Allow a minimum of 30 minutes dwell time to a maximum of 240 minutes. Extended
dwell time may require rewetting of parts.
The emulsifier may be applied by dipping or spraying. The preferred method of
application is by dipping the part in the emulsifier. Do not permit emulsifier
remain on the part over 3 minutes.
Rinse the part by waterwash using a low-pressure spray (pressure not to exceed 40
PSIG) and a temperature of 16C to 38°C (60°F to 100°F).
If a dry nonaqueous developer is to be used, first dry the part in a drying oven at a
temperature not to exceed 60 °C (1 40°F) until dry. Then apply thedeveloper.
If an aqueous developer is to be used, then submerge the part in
solution immediately after washing. Follow by drying the part in a drying oven as
mentioned above. In either case, parts shall be removed from the drying oven as
soon as they are dry.
Perform inspection under black light.
Type I, Method B, Level 3 or 4 (post emulsifiable-lypophilic) Penetrant (Refer to