Paper making in 100 words
Answers
Explanation:
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Answer:
Paper is made in two steps:
Cellulose fibers are extracted from a variety of sources and converted to pulp.
Pulp is combined with water and placed on a paper making machine where it is flattened, dried, and cut into sheets and rolls.
Most paper is made from forestry products, usually trees. The most common of trees that paper comes from are:
Spruce
Pine
Fir
Larch
Hemlock
Eucalyptus
Aspen
Birch
In most cases, the best parts of these trees are used for construction, and less desirable portions are used in pulps
Natural fibers such as cotton are used in some cases because its fibers are very strong. This makes it an excellent choice for documents that may need to be archived. This strength, combined with its unique feel is why cotton paper is popular for letterhead and other corporate stationary products.
Many papers include different types of recycled content. These include:
Pre Consumer Waste (paper waste from the paper manufacturing and printing processes)
Post Consumer Waste (paper waste that has already touched a consumer, like a recycled newspaper)
Sawdust
Although many fibers were mentioned above, forestry products (logs from trees) are the source of most fiber in paper pulp. There are three main components, which must all be separated to make pulp.
Bark
Fiber
Lignin
The bark protects the fibers of the log, which are held together by lignin. The goal is to extract the fibers, and this is accomplished either using a chemical or mechanical process.
Paper mills all work a little bit differently, so please keep in mind that these are generalizations