BetterPress Ink Regal Tones Mini 4-Pack Set includes four 3x4 cm ink pad colors of Bark, Mulberry, Cosmic Sky, and BetterPress Black. These inks are specially formulated Ranger Archival Ink made for the BetterPress Letterpress System. They are acid free, permanent, and waterproof. Follow the BetterPress Letterpress System instructions to create beautiful and detailed letterpress effects with these inks.