Detection of surface breaking defects only.
This test method uses the forces of capillary action
Applicable on any material type, as long they are non-porous.
Penetrants are available in many different types:
Water washable fluorescent
Solvent removable contrast
Solvent removable fluorescent
Post-emulsifiable fluorescent
Inexpensive
Quick results
Can be used on any non-porous material
Portability
Low operator skill required
Surface breaking defect only & little indication of depths
Penetrant may contaminate component
Surface preparation critical & Post cleaning required
Post cleaning required & Temperature dependent
Potentially hazardous chemicals
Cannot test unlimited times
