Use Alumni-Chek Sprays to find surface cracks in aluminum and cast iron without electricity or special lights. The Alumni-Chek crack detection method is ideal for aluminum but also works on brass, cast iron, steel, crbide and Stellite. Even the tiniest cracks will show as bright red.
Alumni-Chek Cleaner - AC-1 is used to prepare the surface you're testing.
Alumni-Chek Penetrant - AC-2 is applied to the area being tested. Allow the penetrant dye to stand for 1-5 minutes for normal cracks and up to 20 minutes for extremely fine cracks. Wipe off excess dye to prevent false readings. If the dye has hardened, spray lightly with cleaner and then wipe off excess die.
Alumni-Chek Developer - AC-3 is used to develop the dye. Apply the Developer in several light applications rather than one heavy application. Allow the developer to dry for 30 to 60 seconds then inspect the area for the cracks that will show bright red.