You can refill them and I encourage you to do so. This video explains how to refill the pencil, complete with close-ups. Don't throw them away, refill them! Remember, the Paper-Mate Sharpwriter pencil uses 0.7mm lead. Standard Pentel lead will work excellent. The video was recorded with a Sony EVO-210 Video 8 8mm VCR.
Uses of Carbon. Carbon (in the form of coal, which is mainly carbon) is used as a fuel. Graphite is used for pencil tips, high temperature crucibles, dry cells, electrodes and as a lubricant. Diamonds are used in jewelry and â because they are so hard â in industry for cutting, drilling, grinding, and polishing.
Atomic structure of graphite. atom cube image by Sergey Tokarev from Fotolia.com. It is interesting to note that graphite is used as lead in pencils for writing purposes and as a good lubricant in heavy and light bearings -- in its dry form as well as after mixing it with grease and oil.ue to this weak bonding between the atoms in the overlapping sheets, there is a tendency for the sheets to easily slide over each other, which causes slipperiness. It is due to this slipperiness effect that graphite acts as a good lubricant.