The Pigma Red Fine Line Design Pen .25mm by Sakura is a high-quality pen that is perfect for various art and craft projects. The pen features a true color reproduction and has an outstanding acid-free ink that is archival quality, waterproof, and water-based. It does not smear or feather when dry and will not bleed through most papers. With its fine 0.25mm point size, it is ideal for graphic art, sketching, pen and ink illustrations, calligraphy, letter writing, and legal documents. The pen is AP non-toxic, making it safe to use.