Many cracks in engineering materials can be deep despite having a small opening width on the surface. Weld Check can augment visual inspection methods. To use, the operator uses a weld cleaner and penetrant remover to remove dirt and contaminants from surface to be analyzed and prepares the surface for testing. The operator then applies the penetrant, a red-colored liquid designed for the non-destructive testing of surfaces and structures, and the developer. Once 5 to 15 min have passed, weld defects will appear in red.
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