TM 1-1520-253-23
(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 (60 ), refer to Nondestructive
C
F
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 be-
fore 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 de-
veloper dwell time is complete.
h. Materials:
Type I, Method C, Level 3 or 4, Solvent - Removable
Fluorescent Dye Penetrant (see Table 1-8).
