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Garrett C


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September 23, 2014







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Untreated wood-pulps, so called mechanical wood, or ground wood, continue to be used for very cheap papers such as newspapers.
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Experiments with ground wood-pulp also began in the 1840s. It was not long, however, before it appeared that without the removal of the lignin(22), (which gives wood its strength) and the natural resins, the paper very quickly deteriorated.(23) Experiments to improve the wood-pulps, which were mostly of pine or spruce woods, began in the 1850s with chemical treatments to remove the lignin and resins...
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