Dietzgen 471 20 lb Engineering Vellum 24" x 500', 3" Core, 1 Roll/Box The Dietzgen 471 20 lb Engineering Vellum is a premium 100% cotton fiber engineering vellum designed for producing CAD drawings, architectural plans, engineering documents, GIS maps, and archival intermediates. Its naturally high-transparency matte surface delivers excellent toner and ink adhesion, crisp line acuity, sharp image quality, and exceptional durability for repeated handling, making it an ideal choice for technical drawings, overlays, and long-term document preservation. Unlike standard bond papers, this archival-quality vellum resists yellowing and fading caused by age or ozone exposure. Key Features 24" x 500' roll, 3" core, 1 Roll/Box 20 lb (75 gsm, 3.3 mil) engineering vellum 100% cotton fiber with smooth matte finish and high transparency Excellent toner and ink adhesion with crisp lines and sharp image quality Exceptional durability for repeated handling and archival applications Acid-free, recyclable, and biodegradable Compatible with wide-format inkjet and toner printers Ideal For Ideal for architects, engineers, surveyors, GIS professionals, reprographic departments, government agencies, and commercial print providers producing archival CAD drawings, engineering plans, overlays, reproducible originals, technical illustrations, and long-term project documentation requiring excellent transparency and durability.