Gel ink pen features a fluorescent element making the ink glow under a black light source. Archival-quality water-based ink is chemically stable permanent waterproof and fade-resistant. Ink does not smear feather or bleed through on most papers. 1.0mm ball delivers a consistent 0.5mm line. Pen writes on vellum (a heavy creamy-colored paper resembling parchment). Ink meets ASTM and ACMI nontoxicity standards. Pen is not recommended for use on fabrics intended to be washed and not evaluated for cosmetic use on skin. General Information Manufacturer: Sakura Color Products of America Inc Manufacturer Part Number: 38172 Manufacturer Website Address: http://www.sakuraofamerica.com Product Name: Moonlight Gel Ink Pen Packaged Quantity: 1 Each Product Information Pen Point Size: 1 mm Ink Type: Water Based Ink Color: Green Features: Water Proof Fade Resistant Smear Proof Ink Bleed Resistant Ink Non-toxic Miscellaneous Certifications & Standards: ACMI-AP