ZIG Clean Color Real Brush is a brush type watercolor pen, so it can be widely used for illustration, design, lettering, manga, etc. As it is a water-based dye ink, it can be mixed with water and other colors and blenders of brushes.[ Various uses]Stand the pen upright and draw a thin line, or grab the pen at an angle to color a wide area. When combined with a water brush, you can easily express blur. Slightly moisten the tip of the pen with water to create multiple gradations of one color.[ Real Brush]You can combine multiple colors to create a gradient. Start by painting a darker color. Before it dries, add another color to create a color gradient. Great for watercolors, fine arts, modern calligraphy, crafts, journaling, card making and scrapbooking. You can also apply dark ink directly to the tip of a light-colored pen to create a gradation when drawing in bright colors.