Traditional wooden pencils are manufactured using the same process that was introduced in the 1600s. The use of modern woodworking machines and automation methods has streamlined the process of manufacturing pencils. However, the pencils available today do not vary that much from their predecessors. Pencils are the end result of the sandwiching process that involves graphite and cedar wood slabs.
Though the inner core of pencils is made of graphite, people can still call it lead. The outer case of conventional pencil is made of wood and its inner core is consisting of mixture of clay and graphite, or colored pigments for color pencils and even charcoal.
• The primary step is to make the pencil core called lead. Graphite is a soft mineral and it is ground then mixed with water and clay. The process happens in the mixing chamber, and after the process, the water is removed. Then the mixture is dried to form a powder, and then it will be mixed with water again to create a soft paste that will be fed into thin metal tubes is squeezed out to form the pencil core.
• The traditional wood pencils require wooden case that is made of cedar. In the factory, eight shoal grooves are cut down into one side of the slat, and then the graphite cores are put into the grooves.
• Then the grooved slat is glued with another slat. The slats are glued in such a way that the grooves are overlapped with each other that form a tube-like appearance, containing the graphite core.
• The slats are to be clamped together until its glue dries and they are sent into the milling process, cutting the slats to separate the individual pencils. Then the trimming process comes next to trim the pencils to a uniform length. After which, the pencils are given its shape, either triangular, round of hexagonal.
• The sanding machines are used to smooth the surface of the pencils and prepare them for painting. The pencils are coated with a number of coats of paint.
• The final step is to imprint the brand name and the number that corresponds to the relative hardness of the lead is stamped.