Kodomo Kao Obake Ink Stamp Set Obake Ink is a mysterious transparent ink. When you put it on a stamp and press it on paper, the original color of the paper appears to darken. (It's like when oil splashes on paper and changes color!) Kraft paper is recommended! It doesn't color very well on white or glossy paper. This item has been handled by someone else, so Please refrain from purchasing if you are concerned about this. Stationery Girls Expo 2025 Stationery Stamps Hanko (stamps)