Black Zentangle tiles offer unique possibilities for layering black and white ink. First, fill the black tile with tangles using Gelly Roll white. Wait until the ink is completely dry, then go back in and add detail to the Gelly Roll strokes using the black Pigma Micron pen. Add striping, dots, or wahtever your fancy. Includes 2 Gelly Roll 08 in white, 1 Pigma Micron 08 in black, 1 white pencil, 1 tortillion, and 5 black Zentangle tiles 3.5".