Книга: Papermaking: Paper, Fiber, Pulp, Cotton, Textile, Watermark, TAPPI, Paper Size, ISO 216, Bleaching of Wood Pulp, Coated Paper, Kraft Process

High Quality Content by WIKIPEDIA articles! Papermaking is the process of making paper, a substance which is used ubiquitously today for writing and packaging. In papermaking a dilute suspension of fibers in water is drained through a screen, so that a mat of randomly interwoven fibers is laid down. Water is removed from this mat of fibers by pressing and drying to make paper. Most paper is made from wood pulp, but other fiber sources such as cotton and textiles may be used. Papermaking is known to have been traced back to China about 105 CE, when Tsai Lun, an official attached to the Imperial court during the Han Dynasty (202 BCE-220 CE), created a sheet of paper using mulberry and other bast fibres along with fishnets, old rags, and hemp waste. However a recent archaeological discovery has been reported from near Dunhuang of paper with writing on it dating from 8 BCE, while paper had been used in China for wrapping and padding since the 2nd century BCE. Paper used as a writing medium became widespread by the 3rd century, and by the 6th century toilet paper was starting to be used in China as well.