(A) Paper Selection
Paper selection includes selecting varieties, specifications and quality grade and several other aspects, we can not just focus on one aspect and ignore the others.
When selecting paper varieties, need to be selected according to the desire print print features and printer type you are using. Printed books in color cover, illustrations or advertising inserts, etc., can be used double-sided coated or offset paper; printing trademark can use the single-sided printing coated paper or a single tape; print dictionaries, manuals and other tools book should use paper or thin Toppan paper dictionary; Printing general books can use offset printing paper or letterpress printing paper. The same is generally printed books, if I want to use the need to use the web (except platform wheel printer) on the rotary press, If you plan to print on the platform they need to choose general flat paper; if printed on an offset press should be used in offset paper books, If you choose printed on letterpress printing letterpress printing paper on it.
Many different types of printed matter, and to select the paper according to the specific characteristics of the various varieties of print. With regard to the paper size selection, books and papers related to the open method, it is necessary to open the general law books and paper commonly used format introduced.
Paper Paper production sector in accordance with national standards for production ,, put a piece of paper called a full-full of paper cut or folded into several Sally equal area, called the number the number of open, bound, and that is how much Folio. Various format specifications, there are uniform standards, so the country out of the books printed, the same specifications are the same size.
Because of a variety of paper sizes like format, although a few have cut folded in the same opening, which is not the same size specifications, set into a book, such as collectively, it is not clear how much of the format.
      China's current 787 * 1092 (mm) of a standard sheet of paper, printed in 32 use it to open the book, called the 32 format. In terms 850 * 1168 (mm) of paper to be printed in 32 open book, because a large sheet of paper than a standard format, so to crown a "big" word, called the big 32 format.
Folio choice, generally based on the nature of books, the number of the page, the reader level factors, using the conditions to decide, not some hard and fast rules. Books, periodicals format, most are geometrically 2 to cut, so easy to use the machine when folded into a book binding. 16,32,64 format is more common format, the most commonly used is the 32 format.
Beginning in the longitudinal direction of the knife open method 2 geometric progression, as well as the widespread use of the basic law that is open straight open method. 2 in accordance with geometric cut open, you can also begin under the knife in the width direction, which is called horizontal open method. Horizontal open method uses very little, only some covers, inserts and special printing paper, the use of such open method. To publish special needs, and sometimes non-geometric progression of deformity format, such as 12 open, 18 open, 20 open, 24 open, 28 open, 36 open and so on. Folio deformity folding machine can not be used, a material is relatively cumbersome, manual, error prone to use when binding, it is generally books, especially books printed in more general rarely use. Non-geometric progression of deformity open method, there are three open method, five open method, seven open method.
With the same number and the open method of open printing and binding of books, Folio size and area was chosen as the paper size vary, and therefore pay great attention to the selection of paper paper specifications. In general, the more authoritative works of literature or celebrities, often using 850 * 1168 (mm) of large-sized paper, general fiction and other books for the most common 787 * 1092 (mm) of standard paper. There is also a more common international standard 880 * 1230 (mm), China has officially included in the national standards.
When selecting paper specifications, in addition to pay attention to the size of the paper format, but also to select the appropriate quantification. Generally meet the requirements of the printing and use of the premise, should try to choose a smaller quantitative paper, which can reduce the cost of publication.
After the paper used is selected varieties and specifications, but also a very careful choice of quality paper grades. That is, to be familiar with the characteristics and quality of the various mills of various products, and to keep abreast of the situation and grasp the changes.
In the choice of paper varieties, specifications, manufacturers and quality grade after determining, but also pay attention to the publishing and printing process is preferable to use a factory in the same period the production of printed products to the same book. Otherwise, due to the color of paper at different times by different manufacturers produced the same species tend to have quite different, so that the printed book will happen "sandwich" phenomenon.