Add colors to your crafts with the Fudebiyori brush pens! Kuretake uses water-based pigment ink which is acid-free and odorless. The ink is also waterproof and archival quality, perfect for preserving your memories in scrapbooks or for other crafts. The flexible but hard brush tip allows you to easily draw nice brush strokes making this pen perfect for lettering. The Fudebiyori brush pen is suitable for both small details and large areas and looks fantastic on both light and dark colored papers!