In penetrant testing, the test object is covered with a solution that contains a visible or fluorescent dye. Excess solution is then removed from the surface of the object but is left in surface breaking defects. A developer is then applied to bring the penetrant out of the defects. With fluorescent dyes, ultraviolet light is used to make the “bleedout” fluorescent brightly, which allows imperfections to be seen. With visible dyes, a vivid colour contrast between the penetrant and developer makes the bleedout easy to see. The red or florescent indications in the image represent a defect in this component. Contact Red Deer Ironworks Inc. for penetrant testing in Texas, Colorado and Red Deer.