Sihl 3687 TriSolv™ PostArt Blueback 6 mil Satin Poster Paper 63" x 200', 3" Core, 1 Roll/Box The Sihl 3687 TriSolv™ PostArt Blueback is an economical 6 mil satin blueback poster paper engineered for producing indoor and outdoor posters, billboard graphics, advertising signage, and information displays. Featuring a bright white wet-strength paper base with a blueback layer to block show-through, it delivers vibrant color reproduction, excellent scratch and water resistance, and dependable outdoor durability. Designed to fold without cracking and perform in demanding posting applications, it is an ideal solution for high-volume promotional graphics. Compatible with solvent, Latex, and UV-curable wide-format inkjet printers. Key Features 63" x 200' roll, 3" core, 1 Roll/Box 6 mil (120 gsm) satin blueback poster paper with bright white finish Blueback blockout layer prevents show-through from mounting surfaces or previously posted graphics Wet-strength paper provides excellent outdoor durability for posting and billboard applications Water- and scratch-resistant coating produces vibrant color and sharp image quality Folds without cracking for easy installation, transport, and handling Compatible with solvent, Latex, and UV-curable wide-format inkjet printers Ideal For Ideal for commercial print providers, sign shops, billboard companies, retailers, municipalities, event organizers, and marketing agencies producing indoor and outdoor posters, billboards, advertising signage, information boards, construction graphics, and promotional displays where reliable blockout performance and outdoor durability are essential.