The given diagram illustrates how a lead pencil is produced. Overall, the process consists of three main stages: planting trees, preparing the wood and packaging the final product.
The first stage is planting. Seeds are grown in the ground, and after four months, they are replanted in a larger space. In three years, the small saplings grow into larger trees, which are thinned to ensure proper growth. After 14 years, the trees are ready to be cut down and used as raw material for pencil production. Once fully cut down, the wood is transformed into thin slats, which are then treated to prevent rotting and left to dry for sixty days.
The second stage starts with sticking the black lead into the grooves with the help of glue. Then, another slat is placed on top, forming a sandwich-like structure. This structure is pressed with heat, and after that, the slats are cut into single pencils. This process is called manufacturing.
In the final stage, the pencils are sharpened, painted, and then carefully packaged, making them ready for sale.