This permanent marker contains an ink formula that is designed to last. This marker offers a smearproof, waterproof formula and is designed for precision marking on all types of surfaces: metal, glass, plastic, foil, paper, rubber, cloth, waxed paper, and more. The red ink stands out easily on any light-colored background. This marker features a fine point tip for thin, accurate lines. As these markers are non-toxic so they are extremely safe to use and meet or exceed ACMI AP standard.