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Tear-off horizontal perforations at page top/bottom are exactly in-between standard perforations, at whatever regular interval is used for that particular paper. When the perforated edges of the paper are manufactured so that they tear off the pages in strips, those strips are known as "perfory." [1]
It is common for cheque-books, notebooks and legal pads to have perforations making it easier to tear out individual pages or leaves. Perforation is used in ways to separate loose leaf (or even a form of graph paper from a ringed binder). A fine perforation next to the rings allows the page to be separated from the book with no confetti.
It can be recognized by studying the edge of the stamp closely; true perforations will have torn paper fibers on each tooth, while simulated perforations are smooth. From 2012 to 2016 the United States also sold small numbers of the stamps issued during this period in sheets without die cuts, thus creating imperforated varieties of them.
When the tear is opposed to the direction of the fibers, the paper will tear unevenly, in a jagged line. Handmade paper disperses the fibers in unpredictable directions and therefore yields a paper with the most overall strength. A paper's strength had an influence on the separation methods used for a stamp.
Staple remover. A staple remover (also known as a destapler) is a device that allows for the quick removal of a staple from a material without causing damage. The best-known form of staple remover, designed for light-gauge staples, consists of two opposing, pivot-mounted pairs of thin, steep wedges and a spring that returns the device to the open position after use.
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Book trimming is the stage of the book production process in which the page edges of a book are trimmed so that all pages will stack with perfect edge alignment within the finished book jacket. The step before book trimming is the binding of the folded printing sheets.
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