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.
The most common use of graphite, as a great deal of schoolchildren know, is as lead in pencils. Pencil lead is made from the slag (the not so fine crystals of graphite) mixed with clay.However, the finer crystals of graphite are often sought after and used in electrical components, as graphite is one of the only conductors of electricity that is not metallic in origin.hough graphite is chemically similar to diamond, its physical qualities are very different. Graphite is usually found in brittle, inflexible flakes; graphite is dark and greasy to the touch, smudging readily on objects.