Table 1-5. Penetrant Procedure-Portable or Field Application
(Type I, Method C)
Preparation of Part:
Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
Refer to TM 1-1500-344-23.
Apply penetrant either by brushing or spraying. In a confined area, apply with brush to
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.
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.
Spray a light film of developer over area to be inspected.
Perform inspection under black light. Observe any obvious bleed-out as developer
dries. Complete inspection after developer dwell time is complete.
Type I, Method C, Level 3 or 4, Solvent - Removable Fluorescent Dye Penetrant (Refer
to Table 1-8).