There are more than a dozen varieties of newsprint, letterpress, offset and coated papers for publication and printing. Some are available in web form, some are supplied in flat sheet form, and some are available in flat sheet form. It is also available in web form. Grasping the specifications and measurement methods of various printing papers is particularly important for the publishing and printing industry.
(I) Size of printing paper The size and shape of lithographic paper are determined by the length and width dimensions. The length and width dimensions are determined by the national competent authority according to the method of printing (the most commonly used is the geometrical series opening of 32 open) and the requirements of the printing plate. The web printing paper only specifies its width (or length). The length (or width) of the print sheet is cut out on the printing press. Therefore, the size of the web is the same as the size of the flat paper, but the form is different.
Although the length and width of printing paper is stipulated by the national competent authority, it is not a simple artificial regulation, but it has its scientific basis: First, it is necessary to maintain the appearance of various types of prints printed by conventional opening methods, and not to make printing. Books are square or narrow, giving people an uncoordinated feeling. The second is to keep the books in different opening numbers (such as 16 and 32 open) when using the geometric progression method.
From the standpoint of the aesthetic appearance of prints, the ratio of paper to paper and the ratio of length to width of a book make people feel the most appropriate ratio is the so-called "gold ratio." The "golden ratio" is the length: width = 1.618:1.
To maintain a similar shape for books with different opening numbers, it is necessary to study the method of cutting (or folding) the paper. Paper is generally cut in half. The length after cutting (or folding) is the width before cutting. To maintain the shape similar to the shape before cutting, the ratio of length to width before cutting must be maintained. That is to say: a:b=b:(a/2). That is to say, in order to keep the shape of a 32-book book similar to the shape of a 16-open and 64-open book, it is necessary to make the ratio between the length and width of the paper size close. At 1.414:1.
Many countries abroad use this aspect ratio. Such as the Japanese flat-bed paper 841 × 1189 (MM), China's international use of the size of 880 × 1230 (MM).
According to the provisions of the People's Republic of China National Standard GB147-89, the width of the web (unit: MM) is:
1575
1562 1400 1092
1280 1000
1230
900
880
787
Tablet paper size (unit: MM) is:
1000M×1400
1000×1400M
900×1280M
900M×1280 (to be continued)
(I) Size of printing paper The size and shape of lithographic paper are determined by the length and width dimensions. The length and width dimensions are determined by the national competent authority according to the method of printing (the most commonly used is the geometrical series opening of 32 open) and the requirements of the printing plate. The web printing paper only specifies its width (or length). The length (or width) of the print sheet is cut out on the printing press. Therefore, the size of the web is the same as the size of the flat paper, but the form is different.
Although the length and width of printing paper is stipulated by the national competent authority, it is not a simple artificial regulation, but it has its scientific basis: First, it is necessary to maintain the appearance of various types of prints printed by conventional opening methods, and not to make printing. Books are square or narrow, giving people an uncoordinated feeling. The second is to keep the books in different opening numbers (such as 16 and 32 open) when using the geometric progression method.
From the standpoint of the aesthetic appearance of prints, the ratio of paper to paper and the ratio of length to width of a book make people feel the most appropriate ratio is the so-called "gold ratio." The "golden ratio" is the length: width = 1.618:1.
To maintain a similar shape for books with different opening numbers, it is necessary to study the method of cutting (or folding) the paper. Paper is generally cut in half. The length after cutting (or folding) is the width before cutting. To maintain the shape similar to the shape before cutting, the ratio of length to width before cutting must be maintained. That is to say: a:b=b:(a/2). That is to say, in order to keep the shape of a 32-book book similar to the shape of a 16-open and 64-open book, it is necessary to make the ratio between the length and width of the paper size close. At 1.414:1.
Many countries abroad use this aspect ratio. Such as the Japanese flat-bed paper 841 × 1189 (MM), China's international use of the size of 880 × 1230 (MM).
According to the provisions of the People's Republic of China National Standard GB147-89, the width of the web (unit: MM) is:
1575
1562 1400 1092
1280 1000
1230
900
880
787
Tablet paper size (unit: MM) is:
1000M×1400
1000×1400M
900×1280M
900M×1280 (to be continued)
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