Abstract
A VALUABLE development in the use of fluorescent light is its application to the detection of flaws or cracks in engineering materials, and ademonstration showing its effectiveness was recently given by Colloidal Research Laboratories, 66-70 Petty France, London, S. W. I. Their 'Glo-Crack' system, as it is named, marks a great advance on existing methods and makes the detection of the least visible form of crack as nearly as possible a certainty. The articles to be examined are first immersed for ashort period in a hot bath of fluorescent material. They are then transferred to a second bath containing a solution which removes all the fluorescent material except that which is entrapped in any flaws or cracks. This part of the process is very much the same as the familiar one of degreasing and, as a secondary advantage attached to the new process, it may be mentioned that the hot bath is actually an efficient degreasing agent.
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Detection of Cracks in Engineering Materials. Nature 150, 343–344 (1942). https://doi.org/10.1038/150343c0
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DOI: https://doi.org/10.1038/150343c0