Sakura Gelly Roll Moonlight pens feature vibrant, opaque ink that shows up equally well on white and black paper, as well as on matte and glossy paper. Use them to create beautiful artwork, decorate your journal or planner, or give your photos and gift cards a distinctive flair. Their ink is nontoxic and resists feathering and bleedthrough on most papers. The ink is also archival and fade resistant, except the fluorescent colors, which fade if exposed to sunlight.