For artists, photographers, and preservationists seeking superior quality, the Archival Methods Museum Board 16x20 Warm White 4 Ply PKG 25 is an exceptional choice. Crafted from 100% cotton fiber pulp, this museum board is meticulously designed to protect and preserve your valuable works. The warm white tone of the board is achieved without the use of a yellow cast, ensuring a natural and appealing aesthetic. The board is acid-free and lignin-free, incorporating alkaline or neutral sizing to prevent degradation over time. The board is also buffered with calcium carbonate, providing a robust defense against the harmful effects of acid migration from matted works or a polluted environment. This buffering process helps maintain the pH of the mat board, preventing it from becoming more acidic with age. The Archival Methods Museum Board is free from optical brightening agents, metal particles, waxes, plasticizers, and residual bleach peroxide. It also boasts a sulfur content of less than 0.0008% reducible sulfur, ensuring the longevity and integrity of your artwork. The board's color dyes are light-fast and non-bleeding, offering a stable and vibrant display for your pieces. The board is also free from post-consumer waste recycled pulp, ensuring a clean and eco-friendly product. The board's alkaline sizing is used for both internal and external sizing, with no alum used in the manufacturing process. The board also passes the rigorous Photographic Activity Test (PAT) ISO IT 18916, formerly ISO 14523 ANSI IT9.16, ensuring its suitability for preserving photographic works. The Archival Methods Museum Board 16x20 Warm White 4 Ply PKG 25 is ideal for matting, mounting, and preserving fine prints, precious documents, traditional and digital photographs. It provides a 1/16" separation between your artwork and its glazing, offering a flat, supportive backing for both display and storage. Experience the difference of superior preservation with this high-quality museum board.