abstract |
The present invention relates to a pencil lead which is based on a polymer, is extrudable, non-expandable, non-calcined and comprises graphite, 25 to 100 wt % (advantageously 50 to 100 wt %, relative to the total weight of said graphite) 100 wt%) of the graphite is expanded graphite. The invention also relates to a pencil comprising such a lead. |