Matboards can be categorized into three basic types:
Standard Grade (acid-free mat boards)
Matboards in this category are constructed of wood pulp that is treated with calcium carbonate to slow the harmful effects of acid and lignin. These are also known as decorative matboards. This type of matboard is recommended for general matting and framing presentations. Suitable for most everyday matting needs.
Conservation Grade (100% virgin alpha-cellulose surface, core and backing)
Acid-Free and Lignin-Free, creating a purified paper that is fade and bleed resistant and buffered with calcium carbonate to keep them safe for long term presentation of art. This product meets all Conservation Quality standards set by the Fine Art Trade Guild. Best for art of personal value, photography, limited edition and fine art prints, and documents/diplomas. The choice of professionals...when quality matters!
Museum Grade (100% cotton mats - museum archival quality)
Museum mat boards are made of cotton which is naturally acid-free and lignin-free so it starts and stays pH neutral and safe for art. Meets all standards for Museum Quality as set by the Fine Art Trade Guild. Lifetime of protection. Suitable for valuable works of original art, historic documents, other artwork desiring museum grade presentation and preservation. When nothing but the absolute best will do.