Compositions for use in methods for non-destructive testing of materials and wares
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United States of America Patent
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Aug 18, 1998
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app pub date -
Nov 20, 1996
filing date -
Jun 6, 1994
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Abstract
A non-destructive testing method for revealing surface and through defects in materials and articles. The method comprises filling up defects with a volatile penetrant, applying indicator material to a surface to be tested, removing the indicator material from the surface and registrating defects according to the presence color spots, shapes and dimensions which are functions of shapes and dimensions of real defects. The indicator material comprises a gas-permeable base with applied sulfonephthalein indicator in the range of 10.sup.-4 to 10.sup.-3 grams per 1 cubic centimeter of the base.
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