HP LaserJet Enterprise MFP M630 Print Media Guide - Page 41
Specifications, U.S. paper grades, Common paper grades and basis weights
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4 Specifications This appendix provides paper specifications. ● U.S. paper grades ● Common paper grades and basis weights ● Weight equivalence table ● Standard media sizes used in laser printers ● Comparisons of paper smoothness U.S. paper grades The U.S. paper-grading system defines the sizes and weights of different grades of paper. The U.S. paper-grading system has evolved through custom and usage, resulting in similar papers having differently stated weights. For example, a 24-lb bond paper is exactly the same weight as a 60-lb book paper, or a 60-lb text, or a 33-lb cover. This is because basis weight is defined as the weight of 500 sheets of paper cut to basic size. The basic size for bond, book/text, cover, index, bristol, and tag are all different, so the given weights for these paper grades can be different although the physical weight is virtually identical. Common paper grades and basis weights This table identifies the basis weights for common paper grades. The basic size for each paper grade is unique, which affects the weight. Paper grade Bond Text Book (coated or uncoated) Cover Bristol Basic size Basic area 17 by 22 inches (432 by 374.0 sq. inches (.241 559 mm) m2) 25 by 38 inches (635 by 950.0 sq. inches (.613 965 mm) m2) 25 by 38 inches (635 by 950.0 sq. inches (.613 965 mm) m2) 20 by 26 inches (508 by 520.0 sq. inches (.335 660 mm) m2) 22.5 by 28.5 inches (571 641.25 sq. inches (.414 by 724 mm) m2) Factor 1.00 2.54 2.54 1.39 1.71 Equivalent basis weights (example) 24-lb bond 61-lb text 61-lb book 33-lb cover 41-lb Bristol ENWW 35