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The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white liquor, that breaks the bonds that link lignin, hemicellulose, and cellulose. The technology entails several steps, both mechanical and chemical. It is the dominant method for producing paper.
Papermaking is the manufacture of paper and cardboard, which are used widely for printing, writing, and packaging, among many other purposes. Today almost all paper is made using industrial machinery, while handmade paper survives as a specialized craft and a medium for artistic expression. In papermaking, a dilute suspension consisting mostly ...
The 1990 Earth Day catalyzed the tree-free paper movement, leading to increased use of alternative fibers like kenaf, hemp, bamboo, agricultural residues, and textile industry scraps. As the papermaking industry evolves, there is potential for a fifth phase focusing on regionally oriented systems and more sustainable fiber sources and ...
Nicolas Louis Robert (2 December 1761 – 8 August 1828) was a French soldier and mechanical engineer, who is credited with a paper-making invention that became the blueprint of the Fourdrinier machine . In 1799, Robert patented the first machine to produce 'continuous paper'. [ 2][ 1][ 4] After a series of legal and financial quarrels with ...
History of paper
Bleaching of wood pulp
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