Fudebiyori pens - gorgeous metallic pigment ink - writes on both black and white. The Zig Fudebiyori metallic brush pen can help you when you need to show some glitz and glam in your artworks. It uses water-based pigment ink which is waterproof, archival quality, acid-free, lightfast, odorless, and xylene-free. Its hard brush tip is also flexible for drawing nice brush strokes.