Permanent, waterproof impressions on most surfaces. Acid free, fade resistant, archival safe and smear resistant when used with watercolor markers. Raised inking surface inks any size stamp with special high-tech foam pad (a light tapping motion inks stamps evenly). Quick drying on most paper surfaces. The new ergonomic case is stackable for convenience & comfort. Ancient Page Ink Pad -Indigo - Clearsnap