印刷排版基础知识（Basic knowledge of printing and typesetting）.doc

印刷排版基础知识（Basic knowledge of printing and typesetting） Two, pre press related factors Printing is a science, and at the same time, it is a systematic project with high technology. The related elements of prepress are summarized below, and there are many painful lessons that are worth learning from. 1, the output film should be how to confirm the cable? Offset printing is the mainstream printing method. It is used to print the film in the output of how many lines, the main consideration should be two factors: first, the printing of printing resolution; two is the kind of substrate. As a matter of fact, the highest resolution of the domestic printing machine is 200 wire, and the foreign printing machine can be added to the 300 line. As for different substrates, the screening requirement is: (1) if the substrate is coated paper or high pressure light white paper, because of its high surface smoothness, can reproduce the finer points, so the net number is higher. Generally can add air to 175-300 lines. Rough ordinary newsprint can be added to 60-80 lines; glossy newsprint, plain letterpress paper or ordinary offset paper can be added to the 85-90 wire; glossy letterpress or offset paper can be expanded to 100-133 lines. (2) if the substrate is offset paper, its surface is thicker than coated paper, and its net number can be between 120-150 lines. (3) if the substrate is reported, the surface is more rough, and the small dots will form broken edges or fall completely into the sunken landlords. Therefore, you should use a larger screen printing, the number of lines can be added between 80-133 lines. 2, roll printing should be how to design the make-up? Roll printing is a printing plate on both sides of the paper, printing a printing paper flip side, rotate 180 degrees, second reprint. Second printing paper at the surface, to change the direction of the mouth. After cutting along the middle, you can get two copies of the same printed matter. This method is suitable for prin