The diagram depicts the entire process of producing lead pencils from start to finish, including packaging. Overall, the process is divided into twelve distinct processes, beginning with seed planting and progressing through processing, shape, and packaging.
In greater detail, the seeds are initially sown for four months before being replanted in a much smaller space. After three years, the trees are thinned and then chopped after fourteen years. Furthermore, they are cut into thin slats and treated for eighty days.
At this point, the treated trees will have been transformed into black lead, which is then cemented into grooves to make a rectangular shape. These slats are progressively inserted one by one.
At this point, the processed trees will have already been transformed into black lead, which is then cemented into grooves to make a rectangular shape. These slats are repeatedly stacked on top of each other, forming a sandwich shape. Finally, they are hard-pressed with heat, chopped, and fashioned into the well-known pencil shape. Finally, they are grouped into specialized packages.