The diagram elaborates upon further insights about the manufacturing procedure of a lead pencil. Overall, the process consists of three main stages, beginning with planting trees and ending with packaging the products.
The first stage commences with seeds cultivated in nurseries and then replanted four months later. This will allow more space and potential for their growth. After three years, the trees are thinned to enhance their growth potential and improve the quality of the wood. Next, after being raised for 14 years, the trees are harvested to provide materials for the production process. The wood is then cut into thin slats, treated, and left to dry for 2 months.
Following this, a groove is made into the slat, and glue is used to stick the black lead into the groove. Then, a new slat is placed on top to form a structure resembling a sandwich, which is then firmly bonded together through a process of hard-pressing and heating.Finally, the pencil is cut into long pieces, painted, sharpened, and stamped prior to being packaged for sale.
