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.
According to Experts, graphite is used as a lubricant because it is  dry lubricant and a solid material with a greasy feel which makes  for a good source for applications wh â¦ ere oil cannot be used.    Graphite is used inside pencils. It slips easily off the pencil  onto the paper and leaves a black mark.aking the world better, one answer at a time. Because graphite forms layers and each layer, each carbon molecule is bonded to three other carbon molecules. The fourth electron to each atom is weakly bonded to the layer next to it.