Paper
Paper
Paper (/ˈpeɪpər/; from Latin papyrus, which comes from the Greek πάπυρος, the word for the Cyperus papyrus plant) is a thin material produced by pressing together moist fibres of cellulose pulp derived from wood, rags, or grasses, and drying them into flexible sheets.
History
Paper was first invented in ancient China in the 2nd century BC during the Han Dynasty and spread slowly to the west via the Silk Road. Papermaking and manufacturing in Europe was established by the Arabs in the Iberian Peninsula by the 12th century.
Production
Paper is produced by pulping wood chips under mechanical or chemical methods to separate cellulose fibres. These fibres are then bleached and then formed into a sheet by draining the water through a fine mesh leaving the fibre evenly distributed on the surface. The remaining water is removed by pressing and drying.
Types of Paper
There are many types of paper, including:
- Printing paper - used for books, magazines, and newspapers.
- Writing paper - used for letters and documents.
- Cardboard - a heavy-duty paper used for packaging.
- Tissue paper - a lightweight paper used for wrapping and padding.
- Parchment paper - used in baking and cooking.
- Wallpaper - used to cover walls in homes and offices.
Environmental Impact
The production of paper has various environmental impacts, including deforestation and water pollution. Many companies are now producing recycled paper to help mitigate these effects.
See Also
External links
- Medical encyclopedia article on Paper
- Wikipedia's article - Paper
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