per is a thin material mainly used for writing upon, printing upon, drawing or for packaging. It is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets.
Paper is a versatile material with many uses. Whilst the most common is for writing and printing upon, it is also widely used as a packaging material, in many cleaning products, in a number of industrial and construction processes, and even as a food ingredient – particularly in Asian cultures.
Paper, and the pulp papermaking process, was said to be developed in China during the early 2nd century AD, possibly as early as the year 105 A.D.,[1] by the Han court eunuch Cai Lun, although the earliest archaeological fragments of paper derive from the 2nd century BC in China.[2]
Contents [hide]
1 History
2 Etymology
3 Papermaking
3.1 Chemical pulping
3.2 Mechanical pulping
3.3 Deinked pulp
3.4 Additives
3.5 Producing paper
3.6 Finishing
4 Applications
5 Types, thickness and weight
6 Paper stability
7 Environmental impact of paper
8 Future of paper
9 See also
10 References and notes
11 External links
History

Main article: History of paper

Hemp wrapping paper, China, circa 100 BC.
The oldest known archaeological fragments of the immediate precursor to modern paper date to 2nd century BC in China. The pulp papermaking process is ascribed to Cai Lun, a 2nd-century AD Han court eunuch.[2] With paper an effective