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02 Juni 2009

how to make paper

Do you know how paper is made? well, people make paper from trees. first, they cut down tress that make good paper, and then they transport the logs to the factory. at the factory, they wash the logs to rinse away dirt and other impurities. after that, the logs are put into machines to make small wood chips and the process these chips into pulp.
This pulping process is to separate wood fibers. This is important because different kind of paper need different kind of fibers. So, that is why they have different techniques of pulping too. The pulp looks like a mushy and watery solution, but if you look at it with a microscope you can see the individual fibers. All have been separated.
When you get this, you are ready to make paper. You do it by removing the water because 99% of the solution is water. To remove the water, they spray the soup on a long wide screen. They call this wire. And then the water runs to the bottom of the wire and fibers are caugh on the top side or the wire. Here, the fibers bonds together and then make a thin mat, the fiber mat. Then people squeeze this mat with rollers to remove more water. After this pressing, the mat still contains water. It is about 60% of it.
Now the mat is ready to in to drying procees. This wat, then, has to in through sown rollers, sometimes a dozen of them. There hot rollers real the fibers closer and eventually turn the mat into paper.
To make paper with the same thickness, people use a paper machine. It hr called the calendar. This machine has big iron rollers that press and dry paper smooth with the same thicknees. from here, you can do everything else. you can coat it with fine clay to make it glossies or easier to print on, and so on. that is why paper comes in different sizes, thickness and appearance.

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