A pigmented ink pen that resists bleeding and is permanent on paper when dry. More Info: UCHIDA-LePen Technical Drawing Pen. These sleek barrel pens are great for all types of art and craft projects. The black pigmented ink is permanent when dry - perfect for both drawing and journaling. This package contains one pen. Available in various tip sizes: each sold separately. Conforms to ASTM D-4236. Imported.BICW