Magnetic Powders can only be used in combination with a Magnetic Applicator (Art.-No. 150). The head of the Applicator contains a magnet which can be withdrawn by lifting the chromed pin on the top to deactivate the Applicator.

The Magnetic Powders contain, apart from the pigments, special kinds of iron particles, which, when covered with pigment, form a brush-like of powder. The Applicator is drawn over the surface to be examined, whereby the head of the Applicator should touch the surface.