Whenever I sharpen a pencil, I always feel that the wood of the pencil is very soft, much softer than the wood I usually see. Is there any particularly soft tree trunk in nature? This makes me want to know the answer.
After searching the book, I finally found the answer. In fact, it is not that there are any particularly soft tree trunks in nature. The wood used for pencil shafts is mostly common northeastern basswood. The secret of the softness is that these woods are processed. In the wood, there are roots of cellulose. Usually, these cellulose rely on lignin and some organic resins to "united" tightly together, no wonder the wood is very strong. However, in the pencil factory, workers process wood into boards of a certain length, width and thickness (usually 184 mm long, 73 mm wide, and 5.1 mm thick), and then send the wood into a large rotatable iron window. Seal the inside and heat it slowly. When the temperature rises above 200 degrees Celsius, the wood in the iron cylinder will change. The lignin will be decomposed by heating, all organic matter will be carbonized, and the moisture in the wood will run out. . At this time, the workers put the paraffin wax into the iron cylinder to fuse it with the wood, so that the wood becomes very soft.
It turns out that a pencil also has such a great knowledge, we must pay attention to the big and small things in life everywhere, and we have knowledge everywhere!
Author: Strongink Pen Kits