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The process of waste paper recycling most often involves mixing used/old paper with water and chemicals to break it down. It is then chopped up and heated, which breaks it down further into strands of cellulose, a type of organic plant material; this resulting mixture is called pulp, or slurry.
Recycling of used paper before the industrialisation of paper production, rag paper was recycled to make low-grade board. A process for removing printing inks from recycled paper was invented by German jurist Justus Claproth in 1774. [2] He practiced together with German paper producer Johann Engelhard Schmid. Today this method is called deinking.
A pile of junk mail. The Post Office Box Lobby Recycling program is a project of the United States Postal Service (USPS) that was created on October 28, 2008, for mail customers to recycle paper items, using recycling bins placed in the customer lobbies of post office buildings.
The P&P Office Waste Paper Processor is a device that recycles paper into pencils by rolling and compressing paper around a piece of pencil lead with a small amount of adhesive. [ 1 ] [ 2 ] The device was designed by Chinese inventors Chengzhu Ruan, Yuanyuan Liu, Xinwei Yuan, and Chao Chen.
Different paper mills are structured for different types of paper, and most “recovered office paper can be sent to a deinking mill”. [78] A deinking mill serves as a step in the recycling paper process. This type of mill detaches the ink from the paper fibers, along with any other excess materials which are also removed from the remaining ...
This page was last edited on 5 November 2023, at 21:32 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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Chemical pulping involves dissolving lignin in order to extract the cellulose from the wood fiber. The different processes of chemical pulping include the Kraft process, which uses caustic soda and sodium sulfide and is the most common; alternatively, the use of sulfurous acid is known as the sulfite process, the neutral sulfite semichemical is treated as a third process separate from sulfite ...
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