Non destructive penetrant testing (PT, LT) is a fundamental flaw detection method, that is widely used in practice. It is based on the detection of surface and through discontinuities in materials and structures by analyzing of the testing and working substances, which come out from defects. Despite on the visible simplicity the implementation of PT and LT allows to reach the record sensitivity. However, it's potential is far from exhaust. And the future of it's development is associated with the use of modern physical and chemical analytical techniques. Some examples of such approach are below: Dye penetrant on this base was developed for food industry. Improvement tasks were solved too by creating of complex sets of flaw detecting materials without the use of flammable solvents. In such direction it was proposed developer which by their nature are designed to work perfectly with the new penetrants. These examples confirm the broad future for development of the PT method and range of NDT tasks, which solution becomes possible.
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