The diagram indicates the aggregate process of producing a lead pencil.

The diagram indicates the aggregate process of producing a lead pencil. Overall, a pencil’s production comprises two primary stages: the cultivation of trees and the shaping process. Seemingly, it takes nearly four years to make this school thing. Initially, seeds are sown and after a certain period of time, we can see their spouts. Then, 4-month-planted trees are transported to a new environment - industrial zones. By the time, the trees have gradually grown and when they are 14 years old, they will be chopped down and moved to factories. Looking at the given pictures, the following steps is shaping. With the help of specialized machines, big wooden blocks are cut into a myriad of thin ‘slats’, which are kept into the storages for 60 days before being formed. Workers place tones of black lead into grooves and use glue to make them fixed. After that, other slats are put above and then crushed together with hard pressure and heat. Small wooden cut pieces are painted, sharpened and stamped respectively to produce the ultimate products - lead pencils.