Before liquid penetrant testing - part appears defect-free.

After liquid penetrant testing, crack is clearly visible.
  LIQUID PENETRANT TESTING -- A company is often measured by those characteristics or capabilities which set it apart from the rest of the competition. At Mack Iron, we are dedicated to meeting our customerís needs not only through quality work, but also through the diversity of our special capabilities. Besides those capabilities listed, our approach to all problems often generates new capabilities and processes.
In-house, SNT-TC-1A qualified magnetic particle and liquid penetrant non-destructive testing performed in accordance with ASME Section VIII, is available.