Printed matter decorates our lives and adds rich colors to them. So what are the characteristics of qualified printing? Printing is very popular, and there are many problems to be noted. Since I have worked in a printing factory in Jinan for several years, I would like to briefly analyze eight different colors and some pre press design considerations based on my personal experience.

　　一、灰平衡，根据理论和生产实践经验，印刷品色彩更难控制的就是灰平衡。灰平衡是在一定的印刷适性,黄色、红色和蓝色由浅到深的三原色版叠印的比例按照一定的网络组合不同亮度脱色(白色、浅灰色、灰色、深灰色,黑色),视觉上的中性灰色的颜色,许多因素影响使用的油墨,纸张、印刷、浓度的完整版本,点,叠印和屏幕行号,相关影响灰平衡,这是对机器精度和操作人员技能水平的测试。

　　1. Grey balance. According to the theory and production practice, the most difficult thing to control is grey balance. The gray balance is suitable for certain printing. The three primary colors of yellow, red and blue, from light to dark, are overprinted in proportion to different brightness decolorization (white, light gray, gray, dark gray, black) according to a certain network combination. The color of neutral gray in vision. Many factors affect the ink used, the complete version of paper, printing and concentration, dot, overprint and screen line number, and the related influence on gray level This is a test of the accuracy of the machine and the skill level of the operator.

　　二、四色屏和三色屏，全色不打印(建议使用专色打印)。

　　2. Four color screen and three color screen, full color printing is not allowed (spot color printing is recommended).

　　不懂印刷设计的人更难印刷。色彩一方面是过多的多色极细的线条，很小的字透白等。

　　People who don't understand print design are the hardest to print. On the one hand, the color is too many multi-color and very thin lines, and very small words are white.

　　四、C=50M=50Y=50K=50的大平网，颜色有点不对严重。

　　IV. for the large flat net with C = 50m = 50y = 50K = 50, the color is not serious.

　　五、正文有四种颜色，即cmyk正文中有四种颜色，尤其是小字，很难覆盖，对机器纸牙的要求非常高。这也是一个常见的问题，所以印前设计师必须检查出版物文件中的黑色文字，特别是小字，是否只出现在黑色版本上，而不应该出现在其他三种颜色上。如果是这样，打印出来的成品质量会大大降低，当RGB图形转换成CMYK图形时，黑色的文字一定会变成四色黑色。除非另有规定，否则必须处理。

　　5. There are four colors in the text, that is, there are four colors in the CMYK text, especially the small characters, which are difficult to cover, and the requirements for the machine paper teeth are very high. This is also a common problem, so the pre press designer must check whether the black text in the publication documents, especially the small characters, only appear in the black version, rather than in the other three colors. If so, the quality of the printed product will be greatly reduced. When RGB graphics are converted into CMYK graphics, the black text will certainly become four-color black. Must be dealt with unless otherwise specified.

　　六、有一个黑色的底座也很难对付。黑色底色为了达到效果可以使用特殊的黑色油墨或打印两次，打印起来并不难，更省力。

　　6. It's hard to deal with a black base. Black background color in order to achieve the effect, you can use special black ink or print twice, printing is not difficult, more labor-saving.

　　七、数色网点叠放，尤其是网点70%以上。具体来说，深褐色、棕褐色、深绿色(平板屏幕，含蓝色70个)、深蓝色、紫蓝色由于存在色差，在印刷机上不容易找到平衡，所以很难印刷出色彩。

　　7. Digital dot overlay, especially over 70% dot. Specifically, due to the color difference between dark brown, Tan, dark green (including 70 Blue flat screens), dark blue and purple blue, it is not easy to find a balance on the printing machine, so it is difficult to print out colors.

　　八、在印刷一般全版物时，专色全版或面积较大、反白字、标志相同、色块相同的情况下，一般很难跟色，容易产生色差、鬼影、擦脏、划伤现象。

　　VIII. When printing general full page materials, when the spot color full page or large area, anti white characters, signs are the same, and color blocks are the same, it is generally difficult to follow the color, and it is easy to produce color difference, ghost shadow, dirt and scratch.

　　以上是济南印刷厂为大家分享的相关内容，想要了解更多内容，欢迎访问网站：http://www.jindingyinshua.comThe above is the relevant content shared by Jinan printing factory for you. To learn more, please visit the website: http://www.jingyinshua.com