The birth of a Book: paper knowledge
The number of flat sheets is calculated in order, regardless of the size of the paper (Encyclopedia), one order per 500 sheets.
The number of web paper is usually calculated in tons, i.e. the quantity is reflected by weight. The weight of a single sheet of paper is expressed in grams per square meter, in GSM, i.e. g / m2. If 80g paper is 80g per square meter, it is 80g paper.
The size of flat paper is 889mm × 1194mm, 880mm × 1230mm, 787mm × 1092mm, etc. the size of these papers directly specifies the size range of books. Before you make a book, it is one of the first questions you need to consider to determine the finished size (opening size) of it.
The thickness of paper refers to the thickness of the paper.
For medium gram thickness, the following estimation methods can be used:
Sub powder paper thickness (mm) = g / 1000
Double paper thickness = g / 1000-0.02
Book paper thickness (mm) = g / 1000 + 0.02
The paper types commonly used in books and periodicals are summarized below for your reference.
In addition, there are newspaper, super matte paper, various forms and exercise books for printing (Encyclopedia), and paper of various types, such as ground drawings, braille printing paper, stamp paper, carbon paper, etc. in addition, in addition, in recent years, there are dazzling special paper and various special fabrics.
There are many properties of printing paper:
l. From the structure of the paper, the paper pattern is produced in the process of paper manufacturing. The longitudinal paper pattern is smooth and the transverse is not smooth. When printing and loading books and periodicals, it is appropriate to have the paper pattern parallel to the spine of the book, so it should be considered when opening the paper;
2. The thickness, smoothness, and expansion rate of paper belong to the physical properties of paper. The smoother the paper, the more can make the fine restore dot. If the paper expansion rate is large, it will make the overprint inaccurate and cause an error;
3. The mechanical properties of the paper include tear, folding resistance, and stiffness, such as the same thickness of paper, sometimes the thickness will be different, in fact, the paper with good stiffness gives people a thicker feeling;
4. The whiteness, opacity, and glossiness of paper belong to the optical properties of paper. The whiteness of paper will affect the color picture of printing, such as the same picture, and the effect will be bright on slightly yellow-white paper; while the effect will be dark when printed on slightly green white paper. In addition, the paper with poor transparency is one of the reasons for the penetration.