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Paper
What is paper?
Paper is made from cellulose fibres. Cellulose consists of long ribbon-like molecules held together in tightly-packed layers to form microfibrils. The microfibrils group themselves in bundles and numerous of these bundles go to form the paper fibre.
The fibres are suspended in water in the proportions of approximately 5% cellulose fibres to 95% water. The fibres are picked up on a mould, in the case of handmade paper, or on the web, in the case of paper-making machines. The mould and web are sieve-like in structure and allow the water to drain away, leaving a felted sheet of paper.
This fundamental process of paper-making has not changed since the first sheet of paper was produced in China around 200 BC.
Early European papers were made from the cellulose fibres from old rags. Later, fibres were extracted specifically to be used in paper-making. Paper fibres come from a range of plants, including:
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flaxalso used to make linen;
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hempalso used to make rope and military uniforms;
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cottonalso used to make fabrics;
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paper mulberry, daphneJapanese paper-making fibres; and
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trees.
| For more information |
| For more information on cellulose and paper, please see the section More About Paper, later in this chapter. |
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