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the penetrant process is a non destructive testing of materials. It applied to the announcement of errors, like pores, tears, linkage errors, laps and folds, which are open to the surface. The procedure is standardized after EN 571-1 (DIN EN ISO 3452).
A Penetrant liquid mentioned is applied on the place which can be examined, which penetrates into existing tears. After the drying process the Penetrant with a flushing is removed from the surface. Subsequently, a developer is applied, that makes existing tears visible by a reaction with the Penetrant remained in tears.
The developer can be so laid out, a fluorescence via UV light effected. The procedure is usable for a set of materials and workpieces. A magnetizability of the test specimen is not necessary.