印刷知识-印前技术(国外英文资料).docVIP

印刷知识-印前技术(国外英文资料) Photoshop need to do work before delivery 1. Make sure the picture is 300dpi/ pixels per inch 2. Make sure the picture mode is CMYK mode 3, determine the bottom (such as pure yellow, pure black, etc.), no other color 4, the file is best for the PSD file format of the unconsolidated layer 5, the text of the picture, it is best not to complete in Photoshop, because once converted to picture format, the word will change hair. Photoshop operations generally contain only image categories. If you are making a printed page, it is better to process images, graphics, and text using different software. For printed images, the most important thing is to pay attention to the resolution and image size of the image. The general formula is: resolution = adding the number of lines * (1.5-2). Next is the color pattern problem; the color pattern of the color image uses the CMYK form. Black and white images, if not special requirements, are generally grayscale patterns. For bar codes such as line drawings that must be represented as bitmap images, the average resolution is not low and 1200dpi is two (Bitmap). In addition, dot collocation is affecting image quality is very important problem. For the contrast, dot size and gray balance data, the CMYK dot matching must be matched with the sequential printing process. For example: if the use of offset printing, the general dot contrast between 5%-85%; if it is coated paper printing, dot contrast between 2%-98%. Despite the changes in turn the world upside down desktop publishing technology, has brought more and more advantages to the processing of graphic information, the output output center also has been constantly improved, but some things have not changed: customers always exist in the output file file missing fonts and image resolution error, order the error page setup and other issues. Problems like this often happen at the output center, in the wrong font, or the image disappears, or the document cannot print at a