Archival Methods 32x40" 4-Ply Black Cotton Museum Board, 15 Pack

If you're seeking a premium, professional-grade solution for matting, mounting, and preserving your valuable artwork, photographs, and documents, look no further than the Archival Methods Museum Board. This top-tier board is meticulously crafted from 100% cotton fiber, ensuring a durable and stable foundation for your pieces. The robust 4-Ply, 60 Pt. construction, approximately 1/16" thick, offers a substantial separation between your artwork and its glazing, which is essential for both display and long-term storage.The deep, solid black color of the board provides an elegant and distraction-free background, enhancing the visual appeal of your matted work. Each board in this 32x40 inch package is acid- and lignin-free, featuring alkaline or neutral sizing, which is paramount in preventing degradation over time. The boards are conscientiously buffered with calcium carbonate, maintaining a 2-3% alkaline reserve with a pH of 9 +/-0.5, to safeguard against acid migration and environmental pollutants that could otherwise compromise the mat board's integrity.Adhering to the highest archival standards, the Black Museum Board is free from any post-consumer waste recycled pulp, metal particles, waxes, plasticizers, and residual bleach peroxide. The sulfur content is impressively low at less than 0.0008% reducible sulfur, while the iron and copper contents are kept well below the thresholds of 150ppm and 6ppm, respectively. Additionally, no optical brightening agents are used in the pulp, ensuring the board's color remains consistent under various lighting conditions.The color dyes are light-fast and non-bleeding, so you can trust that the board will not degrade or cause harm to your mounted matted artwork. Furthermore, the board passes the rigorous Photographic Activity Test (PAT) according to ISO IT 18916 standards, formerly known as ISO 14523 ANSI IT9.16, which is a testament to its archival quality.With a Kappa number of less than five, as tested by TAPPI 236 cm-85, the lignin content is kept to a minimum, reducing the risk of discoloration and deterioration. The sheets are seamlessly laminated together using an all-natural starch adhesive, which contributes to the board's overall strength and longevity.For those who demand the utmost in preservation and presentation, the Archival Methods Museum Board is an impeccable choice. It is designed to meet the needs of professionals and enthusiasts alike who require a reliable, aesthetically pleasing, and archival-grade matting solution.