Saturday, January 4, 2020

The Process of Papermaking - 1063 Words

The United States had been the world’s leading producer of paper until it was overtaken by China in 2009. The paper industry is dominated by North American, Northern European and East Asian countries. Paper is discovered by the Chinese 2000 years ago, it has been used ever since as a communication medium. Paper is always around with people and paper is actually documenting the world. It plays a vital role as a passport to knowledge, a storage medium, a persuasive tool and an entertaining art form. Paper is a sustainable resource and permanent document. It is the universal medium on which to chronicle every day history which carries the past. Papermaking today is a large, capital-intensive industry, characterized by high speed machines and†¦show more content†¦After that, an alkaline chemical solution and steam are used to dissolve the lignin, the fiber is held together by the glue. The sawdust is cooked in a continuous digester in which the sawdust, chemical solution and steam are added continuously. Then, sawdust pulp is discharged from the digester. The wood chips are cooked in batch digesters where the chips and the chemical solution are added at the beginning of the cooking process. In this process, steam is continuously added to batch digester to cook the chips, and the pulp is discharged at the end. Next, the process of separating the used chemicals from the pulp fiber is done by the brown stock washers. The chemicals are then delivered to the chemical recovery process for reused and recycle in mill (Froass, Ragauskas, Jiang, 2008). The washed pulp is then processed through screens to removed oversized debris before the high quality fiber is sent to storage for papermaking. The third stage for paper-making process is mechanical pulping. Mechanical attrition is used to pulp lignocellulosic material to produce the pulp. Lignin is reserved in the pulp to produce good harvest of the pulp. The pulp turns yellow while lignin is exposed to the light and air. Stringer bark and dirt tolerances are used with the chip aged below than two weeks. At the same chip, it is discolored by recession and air oxidation. Before the pulping isShow MoreRelated Ancient China Essay1055 Words   |  5 Pagestoday we call paper. Tsai Luns thin, yet flexible and strong paper with its fine, smooth surface was known as Tsai Ko-Shi, meaning: quot;Distinguished Tsais Paperquot; and he became revered as the saint of papermaking. It wasnt until the third century when the secret art of papermaking began to get out of China, first to Vietnam and then Tibet. â€Å"Taught by Chinese papermakers, Tibetans began to make their own paper as a replacement for their traditional writing materials† (Georgia Tech). It wasRead More Contemporary Hand Papermaking in North America and Europe 2932 Words   |  12 PagesContemporary Hand Papermaking in North America and Europe The practice of making paper by hand draws forth past centuries in a single sheet of tangled fibers. At the same time, the advances of both contemporary hand papermakers and modern technology have merged this tradition with innovation to create paper of unsurpassed beauty and quality. Despite the speed and economic advantages of machine-made paper, traditional handmade paper grasps its hold on the modern world, and mills across NorthRead MoreAncient Chinese Compass And Its Effects On Civilization1581 Words   |  7 Pages400 B.C.E (Chinese Culture, Tradition, and Customs.). Up until 1450 C.E., China was more technologically advanced than any other country in the world, beating out Europe and the Islamic territories. 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Process technologies therefore play a vital role in adding value to any packaging solution. When it comes to printing technologies, the customer can choose from a variety of options, including high quality post print and litho-lamination. Further options

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