Inside Picture Framing #2: Preservation
There are many books about preservation of framed art, documents, photos and objects. This is in no way a comprehensive treatment. In general, the contents of the framing package (backer board, mounting board, mats, etc.) should be acid free. Even if the art or item being framed is acidic this is generally the rule to prevent the package contents from degrading over time. If the art, document or photo is on an acid free substrate (paper) this is especially true as the acid from non-acid...
