Inspection penetrant process and compositions employing mixtures of fluorescent indicator dye and non-fluorescent ultraviolet absorber dye
Abstract
Abstract AN INSPECTION PENETRANT PROCESS AND INSPECTION PENTETRANT COMPOSITIONS WHICH UTILIZE MIXTURES OF FLUORESCENT INDICATOR DYES AND ULTRAVIOLET ABSORBER DYES DISSOLVED IN LIQUID PENETRANT CARRIER MATERIALS. THE PENETRANT COMPOSITION DISCLOSED MAY BE USED IN THE DETECTION OF SURFACE DEFECTS IN TEST OBJECTS IN THE PRESENCE OF A BACKGROUND OF SHALLOW POROSITY INDICATIONS. THE NOVEL COMBINATION OF AN ULTRAVIOLET ABSORBER DYE WITH A FLUORESCENT INDICATOR DYE PROVIDES A RELATIVELY SHARP TRANSITION OF A FLUORESCENTE REPONSE, WITH THE RESULT THAT THE BRIGHTNESS REPONSE OF POROSITY INDICATIONS IS SELECTIVELY DIMINISHED WITHOUT ANY SUBSTANTIAL LOSS IN THE BRIGHTNESS OF UNDERLYING CRACK INDICATIONS, WHEREBY THE SEEABILITY CONTRAST AND DETECTABILITY OF ACTUAL CRACK INDICATIONS IS SUBSTANTIALLY IMPROVED.
Inventors
- 👤 James R Alburger
Bibliographic Details
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