The penetrant may be many plastics, ceramics, glass, etc. used in ferrous and non-ferrous metals. In this case, cracks may be made easily as well as to both of magnetic non-magnetic materials. This procedure assumes that the error to the surface open. Another advantage of this method is very straightforward to use. The application can quickly and reliably take place without much preparation or equipment in any situation. The proof is done without long wait.
Applications are: welding, foundries, automotive, container, shipbuilding, aerospace, metal and steel, steel works, etc.