Sakura Pigma Micron is a high-quality fade resistant ink pen. The Micron is a widely used industry standard for fine to ultra-fine lines. They are perfect for outlines or illustration in your Montana Colors Blackbook. When accuracy, detail and preservation count, Micron pens are the most reliable choice. Artists, crafters, hobbyists, draftsmen, engineers and even scientists consider this pen a necessary tool for any handwritten or hand-drawn project.