TM 1-1500-204-23-7
Table 3-2. Penetrant Inspection Materials
MIL-1-25135D
DESCRIPTION
DESIGNATION
TYPE I
FLUORESCENT DYE PENETRANT
TYPE II
VISIBLE DYE PENETRANT
TYPE III
VISIBLE AND FLUORESCENT PENETRANT (DUAL MODE)
METHOD A
WATER WASHABLE (WW)
METHOD B
POST EMULSIFIABLE, LIPOPHILIC
METHOD C
SOLVENT REMOVABLE
METHOD D
POST EMULSIFIABLE, HYDROPHILIC
SENSITIVITY LEVEL 1.
LOW SENSITIVITY
SENSITIVITY LEVEL 2.
MEDIUM SENSITIVITY
SENSITIVITY LEVEL 3.
HIGH SENSITIVITY
SENSITIVITY LEVEL 4
ULTRA-HIGH SENSITIVITY
FORM a.
DRY POWDER DEVELOPER
FORM b.
WATER SOLUBLE DEVELOPER
FORM c.
WATER SUSPENDABLE DEVELOPER
FORM d.
NONAQUEOUS (WET) DEVELOPER
FORM e
SPECIFIC APPLICATION NON-AQUEOUS WET DEVELOPER
CLASS (1.)
HALOGENATED SOLVENT REMOVER
CLASS (2)
NON-HALOGENATED SOLVENT REMOVER
CLASS (3)
SPECIFIC APPLICATION SOLVENT REMOVER
(3)
Steam cleaning Steam cleaning is a modification of the hot-tank, alkaline-cleaning method which can be
used for preparation of large unwieldy parts
(4)
Vapor degreasing. Vapor degreasing is a highly preferred method of cleaning, especially when heavy oils
and grease may fill surface defects Inorganic contamination is generally best removed by the alkaline cleaning process,
but organic soils often respond better to vapor degreasing.
(5)
Ultrasonic cleaning. When cracks are filled with some hard contaminate such as oxide, carbon, or engine
varnish, ultrasonic cleaning may be used to break up (or remove) these contaminates in order that the dye penetrant may
enter.
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