Cotton paper

Source: Wikipedia, the free encyclopedia.

Cotton paper, also known as rag paper or rag stock paper, is made using

cloth (rags) as the primary material. Prior to the mid-19th century, cotton paper was the main form of paper produced, with pulp paper
replacing cotton paper as the main paper material during the 19th century. Although pulp paper was cheaper to produce, its quality and durability is significantly lower. Although pulp-paper quality improved significantly over the 20th century, cotton paper continues to be more durable, and consequently important documents are often printed on cotton paper. Different grades of cotton paper can be produced.

Properties

High-quality cotton fiber paper is known to last hundreds of years without appreciable fading, discoloration, or deterioration,

copy paper because it can more readily absorb ink or toner.[citation needed
]

Cotton paper is typically graded as 25%, 50%, or 100% cotton. Usually it can be checked by holding the cotton paper up to the light and looking just below the watermark for a number. 100% cotton paper may contain small amounts of acids, and should be tested or certified before use for archival documents.

Second-cut cotton linters have a normal average fiber length of 1.45 μm, and have similar properties as a short softwood pulp.[2]

Uses

Cotton bond paper can be found at most stores that sell stationery and other office products. Some cotton paper contains a

banknotes in a number of countries. These banknotes are typically made from 100% cotton paper, but can also be made with a mixture of 75% or less flax.[3] Other materials may also be used and still be known as currency paper
. Higher quality art papers are often made from cotton.

It has found extensive use as a printed circuit board substrate when mixed with epoxy resins and classified into CEM 1, CEM 2 etc.[citation needed]

History

See also: History of paper, Pulp (paper), and Deinking

Cotton was first used with a mixture of

cloths (rags) were the primary material source for paper. Beginning in the mid-19th century, wood pulp supplanted cloth; despite its lower quality, wood pulp was more readily available than cloth rags as global paper production increased.[4] By the turn of the 20th century, most paper was made from wood pulp. Wood pulp paper durability would improve over the 20th century as bookbinders became aware of pulp paper acidity and adopted practices to counteract it, but cotton is still used for specialty papers intended for long-term preservation. As cotton rags now often contain synthetic fibers, papermakers have turned to second-cut cotton linters as raw material sources for making pulp for cotton papers.[5]

See also

References

  1. ^ "What is 100% Cotton Bond Paper?". George Mason University. Archived from the original on December 1, 2008. Retrieved February 7, 2009.
  2. ISBN 978-0-615-13013-2
    .
  3. ^ "Banknotes design and production". Bank of Canada. Archived from the original on December 16, 2008. Retrieved February 7, 2009.
  4. ISBN 978-0-931828-94-2
    .
  5. ISBN 978-0-615-13013-2
    .
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