Kuro Sumi Tattoo Glow Ink is a blacklight sensitive tattoo ink with super flow for easier insertion into the skin. For customers wanting more than a standard tattoo, this provides that extra something special to set their tattoos apart. Kuro Sumi ink is named after the famous ancient Yayoi Kuro Sumi Tangnuni Warrior of Japan. These warriors were an elite force in Japanese history and are still honoured today. The warriors were recognised by their bold markings located under their jaw line and on their abdominal area.