Dietzgen 434 FIBERLOCK 21 lb Treated Bond Paper 18" x 500', 3" Core, 2 Rolls/Box The Dietzgen 434 FIBERLOCK 21 lb Treated Bond Paper is a premium inkjet-treated engineering bond paper designed for high-quality production of CAD drawings, architectural plans, engineering documents, GIS maps, and technical illustrations. Featuring FIBERLOCK® technology , this specially treated bond delivers improved ink adhesion, richer blacks, brighter colors, and outstanding line acuity—particularly on static-head inkjet printers such as HP PageWide XL —while minimizing curl and cockling without sacrificing print speed or color accuracy. It also maintains excellent compatibility with a wide range of inkjet and toner printing technologies. Key Features 18" x 500' rolls, 3" core, 2 Rolls/Box 21 lb (75 gsm, 4 mil) FIBERLOCK® treated bond paper Enhanced ink adhesion for richer blacks and brighter colors Excellent line acuity, image sharpness, and print quality Minimizes curl and cockling while maintaining production speeds Acid-free, elemental chlorine free (ECF), and recyclable Optimized for HP PageWide XL and compatible with inkjet and toner printers Ideal For Ideal for architects, engineers, surveyors, GIS professionals, utilities, construction firms, reprographic departments, and commercial print providers producing high-quality CAD drawings, engineering plans, technical documents, GIS mapping, and everyday production prints requiring superior black density and image quality.