Chartpak Ad Markers Colorless Blender 6 Pack Xylene-based marker for art and design Tri-Nib permanent marker blends and transfers on paper, acrylic, ceramic, egg shell and more Creates unique colors, transfers images and produces watercolor-like effects with colored pencil, graphite and charcoal Non-toxic, conforms to ASTM D 4236 and made in USA Sold as box of 6 markers