Designer Liner is a concentrated, clay-based black pigment, packaged in a 1.25 oz. squeeze bottle featuring a metal writer tip. The metal tip allows for precise application - almost as accurate and precise as a ball point pen. You can create designs, outline shapes or patterns in your design, create stripes, dots, squiggles & lines, or write words. It can be applied directly on clay, bisque, or over other glazes. Designer Liner will fire to a matte finish - a transparent glaze will give it a gloss finish