History of pencils
History of the pencil axes
The age only of the stone ink seems to have used the lump of thinly sharpened graphite by using the thread and the wire, and sandwiching it by the board of the tree, and covering it with something like not breaking, and the hand to be dirty. After that, I cut a square ditch in a slender tree, put the graphite which I sharpened square, and made a lid with a tree, and was able to do the basis of the present shape by the method of shaving. It was this way that the Conte made use of the square core. In the second half of the nineteenth century, the American pencil trader developed a modern method of sandwiching a round core with a rounded shaft plate. This made it easy to use, cheap pencils, and spread worldwide.