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As with any printing, there is also a chance for banknotes to have printing errors. For U.S. banknotes, these errors can include board break errors, butterfly fold errors, cutting errors, dual denomination errors, fold over errors, and misalignment errors.

Materials used for banknotes

Paper banknotes

Until recently, most banknotes were made from cotton paper with a weight of 80 to 90 grams per square meter. The cotton is sometimes mixed with linen,

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