MIL-L-9909A, MILITARY SPECIFICATION: LIGHT, ULTRAVIOLET, METAL EXAMINING (19-JUL-1985) [NO S/S DOCUMENT]

MIL-L-9909A, MILITARY SPECIFICATION: LIGHT, ULTRAVIOLET, METAL EXAMINING (19-JUL-1985) [NO S/S DOCUMENT]., This specification covers a portable black light suitable to detect surfaced flaws when using fluorescent non-destructive testing methods.