Paint marker with an extra fine point is designed for writing and detail drawing on glass, paper, wood, clay, porcelain, stone, metal and mirrors. Lightfast, pigmented paint is opaque, xylene-based, lead-free, acid-free, and weatherproof. Paint markers are great for crafting, home and office use. Paint is not recommended for certain types of plastics, leather, metals, finished wood, paper and fabric products. Paint conforms to ASTM D4236.