Conservation designed to protect collections from the damage caused by handling, atmospheric pollution, fire and flood disasters. This board meets the most stringent requirements of archival storage for conversion into folders or boxes. Archival Folding Boxboard offers a controlled "mini-environment" for books, papers, phptographs and other fragile items adding to physical protection a slightly alkaline environment which helps to counteract any acidity in boxed materials. Reducible sulphur content of the board comfortably meets the american standard for the safe storage of photographic materials. This material meets detailed archival standards in terms of chemical composition whilst offering excellent folding strength and rigidity. The coloured surface of the board resists dirt, grease and abrasion, while the smooth white interior surface is designed to minimise abrasion of box contents and has passed the ANSI photographic activity test. Supplied in long grain flat sheets, Archival Folding Boxboard is available in three callipers.