Editing Pencil (section)

====Plastic====
Invented by Harold Grossman<ref>Grossman, Harold. [http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN/3360489 US Patent 3,360,489], issued 26 December 1967</ref> for the Empire Pencil Company in 1967, plastic pencils were subsequently improved upon by Arthur D. Little for Empire from 1969 through the early 1970s; the plastic pencil was commercialised by Empire as the "EPCON" Pencil. These pencils were co-extruded, extruding a plasticised graphite mix within a wood-composite core.<ref>[http://adlittlechronicles.blogspot.com/2008/07/epcon-plastic-pencil.html The Epcon Plastic Pencil] {{webarchive|url=https://web.archive.org/web/20110708022148/http://adlittlechronicles.blogspot.com/2008/07/epcon-plastic-pencil.html |date=8 July 2011 }}, adlittlechronicles.blogspot.com, for information about this invention.</ref>