Doug Martin's Pencil Pages provides a very thorough and the most informative article I've ever read regarding the Copying Pencil.

The article entitled, "The Copying Pencil: Composition, History, and Conservation Implications" which was written by Liz Dube, Conservator of the University of Notre Dame Libraries. The article was orignally published in "The Book and Paper Group Annual", a publication of The American Institute for Conservation, volume 17 (1998), pp. 45-52.

The article is written from the unique perspective of conservators working to preserve works produced using the copying pencil. The copying pencil is no longer produced to the editor's knowledge and is rarely if perhaps never used these days given the advent of newer reproduction technologies.

Any added knowledge on the current use or production of copying pencils is welcome in form of additional comments to this item.