This is a water-base, non-toxic, non-clogging, highly opaque ink for signs, posters and fine art prints. Use it for printing on paper, posterboard, and wood. Do not use on metal, plastic, or fabrics that are to be laundered. Use any water-resistant, hand-cut film, along with an 8XX or 12XX polyester screen, for best results. These flexible acrylic colors air dry quickly. Wash up screen with soap and water immediately after use.