Transparent papers are frequently found in collections, often dispersed among other materials, and can be in need of some degree of treatment or rehousing, thus proving a significant preservation challenge. Without a clear strategy to tackle the large number, many remain untreated. When treatment is possible the focus is usually idiosyncratic and limited to treating single sheets.
This problem is further compounded because transparent papers respond differently to conventional paper conservation treatments, for example exposure to solvents can alter dimensions, transparency, an surface texture. It is against this background that a project was initiated to provide practical and ethical guidance for the treatment of transparent papers in The National Archives.