How to calculate the paper and cutting knowledge needed for printing books

To make a paper plan for a year or a period, we must first make clear the requirements for the number of volumes of books and publications to be published in this period, such as specifications, text page numbers, inserts, covers, print runs, etc. On this basis, the number of all kinds of paper needed for printing all kinds of books is calculated, and on this basis, the types and specifications of all kinds of paper needed in this period are calculated. ★ Cutting of text paper and calculation of paper consumption To know the paper demand for publishing the text of a book, we must first calculate the number of printed sheets for printing the text of a book. The number of printed pages is related to the number of pages in a book. The specific relationship is: number of pages printed = number of pages (twice the number of pages)/number of pages. If the number of printed pages of a book is known or calculated, the paper consumption for publishing the text of the book can be obtained by the following formula: the number of printed pages = the number of printed pages of the book * the number of printed pages (thousands of copies) ★ The cutting of the paperback cover and the calculation of paper consumption are different from those of the book cover. Because the cover covers the book, the area must be larger than the corresponding body paper. Most paperbacks use offset paper, because offset paper is tough and durable, which can meet all kinds of printing requirements. Book cover paper is widely used to publish pamphlets, while coated paper is used to pursue gorgeous and beautiful books and publications. The basis weight of the cover paper should be proportional to the thickness of the book, and the basis weight of the thicker cover paper should be larger. Take a 32 format as an example. If there are less than 3 general characters, the cover can be 80g/m2 paper. 3-5 sheets, the cover can be 90g/m2 paper; 5- 10 sheets, and the cover should be 120g/m2 paper; If it exceeds 10, the cover should be 150g/m2. In the cutting of paperback cover paper, it is best if the cut cover paper can make the longitudinal stripes of the paper parallel to the books. Otherwise, due to the large lateral expansion of the paper, when the cover is attached to the spine, the cover paper will expand and contract greatly due to moisture and heat, making the spine more prone to wrinkling or bagging. The calculation of cover paper quantity is relatively simple, generally calculated according to the following formula: paperback cover paper order number = printing quantity/cover paper folio quantity /500. If proper arrangement is considered, the order number of paperback cover paper = (printing quantity/cover paper format /500)*( 1+ arrangement rate) ★ Cut and calculate the cover paper of hardcover book. Here is only a brief introduction to the cutting of paper and cardboard for the outer cover of the widely used cloth-spine hardcover book. (1) Cutting and calculation of cover paper of hardcover book The calculation formula of cover paper of hardcover book is: the number of cover papers of hardcover book = (number of printed sheets/number of cover papers /500*2)*( 1+ binding rate) multiplied by 2. Because a cover paper is needed for the front cover and a cover paper for the back cover. (2) Cutting and calculating the cover board of the cloth spine paper hardcover book; The cover plate of a hardcover book with cloth spine paper has two front plates and a bottom plate with the same size. The length of the plate is the length of the book plus the width of the floating mouth on both sides of the ceiling and feet, which is generally equal to the net length of the book plus 5 mm, and the width of the cardboard is the width of the book plus the floating mouth width of the book mouth minus the width of the book slot that the book mouth needs to leave. Because the width of the book slot is close to the width of two streamers, the width of the cardboard is generally equal to the width of the book clip minus 3 mm