Drawing ink is a water-based media made up of dyes. It comes in the form of a small bottle and can be diluted with water. This means it can be used in different concentrations to create large-scale drawings. While pens and calligraphy inks are pigment-based and come in the form of liners, drawing ink is great for planning your drawing before adding the finer details with a pen or fine liners. It can be used to paint over a larger surface area with contrasting tonalities to show the shadow areas within your drawing.