bone folder

Bone folder (left) used with a straight edge (right) to form a crease in a custom archival enclosure. (Courtesy of Karen Walter, Weissman Preservation Center, Harvard University) n. a shaped tool used in archival settings to fold papers and card stock, to tear mending strips, and to crease polyester enclosures


Bone folders most commonly are made from ivory, bone, hardwood, or plastic. The smooth tool is wider at the bottom and narrows to a blunt point at the tip.