MITSICO Liner Color Pens typically refer to a type of pen that features fine, felt-tip points and is primarily used for drawing, coloring, or adding precise details to artwork. These pens come in a wide range of colors, allowing artists to choose from a palette suitable for their artwork. They are suitable for use on a variety of surfaces, including paper, cardstock, canvas, and more. The ink used in liner color pens can be either water-based or pigment-based. MITSICO Liner Color Pens are typically smudge-proof, allowing artists to layer colors or add additional details without worrying about smudging previous work.