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A bone folder or bonefolder is a dull edged handtool used to fold and crease material in crafts such as bookbinding, cardmaking, origami[dubious ] and other papercrafts where a sharp crease or fold is needed.
Often made from the leg bone of a cow, deer, or similar animal, there are also synthetic alternatives made from plastics. However those made from bone may be less prone to leaving residues on the workpiece. In Japanese bookbinding the equivalent folding tool is traditionally made from bamboo, although a Japanese fabric marking tool ("hera") or Western bone folder may be substituted.
The bone folder is also used for marking fabric where a temporary mark needs to be made without damaging the material.
See also 
- Zeier, Franz (1983), Books, Boxes and Portfolios, Translated by Li, Ingrid, New York: Design Press, pp. 30–37, ISBN 0-8306-3483-5
- Smith, Keith A. (1999), Non-Adhesive Binding: Books Without Paste or Glue 1 (Revised and expanded ed.), Rochester, New York: Keith Smith Books, p. 47, ISBN 0-9637682-6-3
- Pickering Rothamel, Susan (2008), The Encyclopedia of Greeting Card Tools & Techniques, New York: Lark Books, p. 42, ISBN 978-1-60059-029-0
- Harrison, Garry; Nadal, Jake. "Repair and Enclosure Treatments Manual". E. Lingle Craig Preservation Laboratory, Indiana University.
- McQueen, Sharon (2005), In-House Bookbinding and Repair, Lanham, Maryland: The Scarecrow Press, p. 17, ISBN 0-8108-5224-1
- Ikegami, Kōjirō (1986), Japanese Bookbinding, Adapted by Stephan, Barbara B., Trumbull, Connecticut: Weatherhill, pp. 12–13, 16, ISBN 0-8348-0196-5