Due to the effect of light, you can enjoy various tones of color depending on the angle from which you look at it. On white paper, it shines with a light pearlescent tone, and on dark paper, it adds a strong metallic tone and shine. On dark-colored paper, strong metallic tones and brilliance are added. Opal Colors can be mixed with other water-based inks and paints as well as with each other. It can be used for all types of artwork, including illustration, painting, and calligraphy.