About the Roland DG AP-640 The Roland DG AP-640 uses resin ink technology to produce durable graphics with vibrant color and low-odor output. The printer is commonly used for retail displays, wall graphics, signage, indoor advertising, and other professional print applications where image quality and durability are important. AP-640 Products and Services This page includes products associated with the AP-640 including maintenance items, replacement parts, cleaning supplies, software, accessories, and service contract options available through Roland DGA Marketplace. Additional Resources Looking for replacement parts for your AP-640? A complete list of compatible parts is available on the Roland DGA Store AP-640 Parts page.