Mixing bright color along side the unique properties of gel ink. Pens will not smear, bleed or feather on most paper surfaces. Gelly Roll Classic: Creamy gel ink pens feature archival, waterproof, fade-resistant & chemical proof ink making them ideal for legal documents, scrapbooks, and any written document where permanence is important (not recommended for use on fabrics that are going to be washed). Gelly Roll Metallic: Shiny, pearlescent colors write on both light & dark papers (glossy or matte). Archival metallic ink is waterproof, fade-resistant, and does not bleed through most papers. Gelly Roll Startdust Galaxy & Meteor: Capture the sparkle & glitter of stars with these pens. Write with glitter ink directly from a pen. Their bright colors offer a shiny finish ideal for cards, notes & paper crafts. Archival quality ink is pigment based. For best results use on light-colored, matte paper surfaces. Gelly Roll Moonlight: Brilliant colors that ignite darkness. For best results use fluorescent colors on dark paper surfaces. Their fluorescent elements allow them to glow under black light. Note: moonlight ink comes in 2 types (archival & fluorescent). Archival Moonlight colors contain pigment-based ink which is waterproof & fade resistant. Fluorescent Moonlight colors can fade if exposed to direct sunlight & glow under a black light.