Technical Drawing Pen

The Technical Drawing Pen is the professional standard for architects, engineers, graphic designers, and technical illustrators who require absolute line precision and repeatability. This 0.35mm pen, also available in 0.18mm, 0.25mm, 0.5mm, and 0.7mm, is designed with a tubular stainless steel nib that draws uniform line widths regardless of drawing speed or pressure, a critical requirement for standardized technical linework. The pressurized refillable ink cartridge system holds waterproof, fade-resistant black pigment ink that flows consistently without clogging or skipping. Lines dry instantly on drafting film, vellum, tracing paper, and cartridge paper. The pen writes at any angle including horizontal on a light box or at a steep incline on a drafting table. The transparent ink reservoir lets you monitor ink levels at a glance. Includes one ink cartridge. Compatible with drawing boards, rulers, templates, and stencils. Maintains ISO line weight standards for professional drafting and technical documentation work.