The diagram illustrates the process through which paper is recycled. Overall, recycled paper production is a four-stage process that starts with the conversion of used paper into pulp, followed by filtration and cleaning, and ends with the production of new paper. Notably, the process involves the extensive use of both machinery and water and chemicals.
The process begins with used paper being transported along a conveyor belt to a tank containing water and chemicals. Once inside the tank, the used paper is converted to pulp, forming the raw material for further processing.
At the second stage, the unfiltered pulp is passed through a filter to remove larger impurities. Following this, air and soapy water are introduced into the mixture. During this procedure, ink rises to the surface and is removed through a small tube.
In the final stage, the clean pulp is again treated with water and chemicals before being spread onto a moving conveyor belt. At this point, the excess water is drained away and the remaining material passes through heated rollers, which press and dry it to form solid paper sheets.