Description Contrast lacquer for crack detection. WS CRACK 5 is a contrast lacquer that is applied on a dark surface turning it white so that there is a greater contrast when applying the product WS CRACK 4 Black magnetic particles, when carrying out a non-destructive test for the detection of cracks by a magnetic field. Application All kinds of welded metal parts and surfaces. How to use Follow ing the instructions of the W S CRACK 4 black magnetic particles: Clean the surface of the piece to be analyzed. If the surface is black, apply the product WS CRACK 5 Contrast lacquer. Shake the WS CRACK 5 product well and apply it on the surface you want to turn white. If the surface is a light color, proceed to the next step. Magnetize the piece in question. Shake the product WS CRACK 4 black magnetic particles for 30 seconds and apply in the area to be analyzed. Important: the piece must be magnetized during the entire test process.
