Penetrant Testing

Liquid penetrant testing is probably the most widely used NDT method. The test object or material is coated with a visible or fluorescent dye solution. The excess dye is removed from the surface, and then a developer is applied. The developer acts like a blotter. It draws penetrant out of the imperfections which are open to the surface. With visible dyes, the vivid color contrast between the penetrant and the developer makes the bleed easy to see. An ultraviolet lamp is used to make the bled out fluorescent brightly, thus allowing the imperfection to be seen clearly.
The training includes : Theory on different types of penetrant, applications, Dwell time, Removal process, Developer, minimum requirements as per code and practical demonstration.