Designed in Japan, the Copic Acrea Paint Markers and Sets are a fun and colorful addition to your toolkit. The markers feature a smooth and lightweight barrel design for easy handling. As for the ink, the markers are outfitted with water-based pigment ink that is fully opaque with flat and streak-free results. When completely dry, the ink is fully waterproof and smudge-free. - Copic Acrea Paint Marker - Mustard Yellow 022.