TM 1-1520-264-23
Table 1-5. Penetrant Procedure-Portable or Field Application
(Type I, Method C)
Task
Description
a.
Preparation of Part:
Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
b.
Precleaning Procedure:
Refer to TM 1-1500-344-23.
c.
Penetrant Application:
Apply penetrant either by brushing or spraying. In a confined area, apply with brush to
prevent overspray.
d.
Penetrant Dwell:
Allow a minimum of 30 minutes penetrant dwell time. In temperature below 16 °C.
(60°F), refer to Nondestructive Inspection Methods manual listed in Table 1-1 for
dwell time compensations.
e.
Penetrant Removal:
Wipe dry with a dry, lint-free cloth. Wipe down with a solvent-moistening cloth. Check
area to be inspected with black light to be sure all surface penetrant has been
removed before applying developer. Do not spray cleaner directly onto part.
f.
Developer Application:
Spray a light film of developer over area to be inspected.
g.
Inspect:
Perform inspection under black light. Observe any obvious bleed-out as developer
dries. Complete inspection after developer dwell time is complete.
h.
Materials:
Type I, Method C, Level 3 or 4, Solvent - Removable Fluorescent Dye Penetrant (Refer
to Table 1-8).
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