Peterboro Museum matboards are constructed from the finest 100% cotton fiber and are constructed in accordance with the international standards as defined by the Fine Art Trade Guild of London England. These 100% Cotton boards are of the finest quality as they maintain the purest form of natural cellulose, require little processing and maintain a history of performance. Accordingly, every board of this premium line adheres to both FACTS and the Fine Art Trade Guild's stringent specifications for Museum Matboards. A 100% cotton board provides the comfort and assurance that matted artwork will be preserved for future generations and at present it is the top choice of framers, museums, and conservators for the mounting, matting, and preservation of fine prints and documents. Peterboro Museum allows framers to uphold the cotton tradition to its fullest while enhancing and protecting your artwork for years to come. • 100% cotton fiber, solid color throughout • Traditional ply construction, buffered with calcium carbonate • Naturally acid and lignin free • Suitable for use in Museum level framing applications • Facing papers exceed minimum standards for fade and bleed as set by F.A.C.T.S. and F.A.T.G. • pH 8.5 - 9.5, buffered with calcium carbonate to an alkaline reserve of 3 -5% • 4 ply and 8 ply thicknesses. (Consult matboard specifier) • Meets Museum Standards as set by F.A.C.T.S. and F.A.T.G. Peterboro Museum board is recommended for: • Valuable works of original art • Surface papers are pigmented for fade and bleed resistance. • Items of historical importance • Treasured heirlooms