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Wide ruled (or legal ruled) paper has 11 ⁄ 32 in (8.7 mm) spacing between horizontal lines, with a vertical margin drawn about 1 + 1 ⁄ 4 inches (32 mm) from the left-hand edge of the page. It is commonly used by American children in grade school, as well as by those with larger handwriting.
Similarly, two sheets of A4 can be scaled down to fit one A4 sheet without excess empty paper. This system also simplifies calculating the weight of paper. Under ISO 536, paper's grammage is defined as a sheet's mass in grams (g) per area in square metres (unit symbol g/m 2; the nonstandard abbreviation "gsm" is also used). [5]
The history of paper is often attributed to the Han dynasty (25-220 AD) when Cai Lun, a Chinese court official and inventor, made paper sheets using the “bark of trees, remnants of hemp, rags of cloth, and fishing nets.” [5] Cai Lun's method of papermaking received praise during his time for offering a more convenient alternative to writing ...
In the United States, the weight is the weight of a ream (bundle of 500 sheets) of varying "basic sizes" before the paper is cut into the size it is sold to end customers. For example, a ream of 20 lb, 8.5 in × 11 in (216 mm × 279 mm) paper weighs 5 pounds because it has been cut from larger sheets into four pieces. [21]
Four Square: Writing Method for Grades 4-6: Judith S. Gould and Evan Jay Gould: 9781573101899: 1999 Four Square: Writing Method for Grades 7-9: Judith S. Gould and Evan Jay Gould: 9781573101905: 1999 Four Square: The Total Writing Classroom for Grades 1-4: Judith S. Gould and Evan Jay Gould: 9781573103336: 2002 Four Square: The Total Writing ...
4 for 40 pages; 6 for 60 pages; 8 for 80 pages; The third numeral stands for the ruling: 0 for blank exercise book; 1 for lined paper—lines at 20 mm; 2 for lined paper—lines at 16 mm; 3 for lined paper—lines at 12 mm; 4 for lined paper—lines at 8 mm; 5 for squared paper—squares are 5 x 5 mm; 10 for squared paper—squares are 10 x 10 mm
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A popular size for books, dubbed AB, combines the shorter edges of A4 and B4. Another two with an aspect ratio approximating 16:9 are 20% narrower variants of A6 and B6, respectively, the latter resulting from cutting JIS B1 into 4 × 10 sheets (thus "B40"). There are also a number of traditional paper sizes, which are now used mostly by printers.