DecoColor® Fine Paint Markers are perfect for adding details to drawings or for fine writing. Write on glass, paper, wood, clay, porcelain, metal, and mirrors. The opaque paint is oil-based and acid-free. Note: Contains Xylene. Not recommended and unsuitable for certain types of plastics, leather, metals, finished wood, paper, and fabric products. Always test on a small inconspicuous area first for suitability and chemical reaction.