The Koi Blender is the best tool for mixing colors and to create fading swipes. Use the tip of the Coloring Brush Pens to put colors on a plastic palette. The ink will not dry so you can absorb the colors by using the Koi Blender. Use the Koi Blender as a brush by taking some color from the palette and putting it on the paper. Start where you want the darkest colors and keep going until you get the desired effect. Another effect is the combining of colors with the Koi Blender. Simply push the tip of one or more Coloring Brush Pens against the tip of the Koi Blender and it will absorb and blend the colors! To clean the tip, keep drawing on a piece of paper until all the ink is disappeared.