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A quire of paper is a measure of paper quantity. The usual meaning is 25 sheets of the same size and quality: 1 ⁄ 20 of a ream of 500 sheets. Quires of 25 sheets are often used for machine-made paper, while quires of 24 sheets are often used for handmade or specialised paper of 480-sheet reams.
Copy paper is used for copying and laser printers. The basis weight is 70-90 g/m 2 (approximately 18-24 lb) and ISO brightness 80-96%. It is made of 90–100% virgin chemical pulp or 100% deinked pulp with total pigment content of 10-15%. The most important quality is smooth run in a copying machine / printer and good dimensional stability.
Although metric, based on the A4 paper size, and named to suggest that it is part of the official ISO 216 paper sizes, it is only a de facto standard. It is often referred to as (metric) "foolscap" or "folio" because of its similarity to the traditional foolscap folio size of 8 + 1 ⁄ 2 in × 13 + 1 ⁄ 2 in (216 mm × 343 mm).
Hemp paper is a possible replacement, but processing infrastructure, storage costs and the low usability percentage of the plant means it is not a ready substitute. [ citation needed ] However, wood is also a renewable resource, with about 90 percent of pulp coming from plantations or reforested areas. [ 21 ]
[citation needed] A4 ("metric") paper is easier to obtain in the US than US letter can be had elsewhere. [citation needed]. The ISO 216:2007 is the current international standard for paper sizes, including writing papers and some types of printing papers. This standard describes the paper sizes under what the ISO calls the A, B, and C series ...
The study also found that there were higher rates of sick leave and illness complaints at the office using large amounts of carbonless copy paper. [9] Another study, which was published in Environmental Health Perspectives, connected chronic occupational exposure to paper dust and carbonless copy paper with an increased risk of adult-onset asthma.
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