Uni Posca Paint Marker PC-1M Black, 2 pens per Pack(Japan Import) [Komainu-Dou Original Package] It is a marker to color vividly as poster color. If this ink gets dry since it is excellent in water resistance, it will not flow into water. You can also be written to the metal / glass / plastic / nails, etc.. Core is a type of extra-fine. It can write to a photograph finely.