6. Special penetrant testing materials
In addition to the "high-temperature" and "low-temperature" penetrant testing materials mentioned in Chapter 1.4, other penetrant testing products have been developed to meet needs not met by "standard" materials.
6.1 Thixotropic materials
The advantage of fluorescent, colour contrast or dual-purpose thixotropic penetrants is that they remain fixed in the areas to be inspected, eliminating the risk of migration into areas where removal would be difficult or impossible, or into areas not compatible with penetrants (painted areas, for example).
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Special penetrant testing materials
Main industrial uses
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