彩色印刷的时候我们该注意些什么？今天济南印刷包装厂家来给大家讲解四点内容。

What should we pay attention to when printing in color? Today, Jinan printing and packaging factory will explain four points to you.

1、掏空

1. Hollowing out

黄色底板上压有一行蓝色字，那么在黄色版上，蓝色字所处位置就一定要空。否则蓝色的东西直接印在黄色上，颜色会产生变化，本来蓝色的字变成了绿色。

There is a line of blue words on the Yellow bottom plate, so on the yellow plate, the position of the blue words must be empty. Otherwise, blue things will be directly printed on yellow, and the color will change, and the original blue words will become green.

2、叠印

2. Overprint

红色底板上压有一行黑色字，那么在红色版上，黑色字所处位置就不应该掏空。因黑色可压住任何色，若将黑色内容掏空，特别是一些较小的文字，印刷时稍微有误差就会导至露出白边，而黑白色反差又较大，很容易看到。

There is a line of black characters on the red bottom plate, so the position of the black characters on the red plate should not be hollowed out. Because black can suppress any color, if the black content is hollowed out, especially some small words, a slight error in printing will lead to the exposure of white edges, and the contrast between black and white is large, which is easy to see.

3、四色黑

3. Four color black

这也是较为常见的问题。输出前需要检查出版物文件内黑色文字，特别是小字，是不是只有黑板上有，而在其它三色版上不应该出现。如果如现，则印刷出来的成品质量会打一折扣，RGB图形转为CMYK图形时，黑色文字肯定会变为四色黑。除非特殊指定，否则将其处理一下，才可输出。

This is also a common problem. Before outputting, it is necessary to check whether black characters, especially small characters, in the publication documents are only on the blackboard and should not appear on other three-color plates. If this happens, the quality of the printed products will be discounted. When RGB graphics are converted to CMYK graphics, the black text will definitely become four-color black. Unless otherwise specified, it can only be output after being processed.

4、图片为RGB模式

4. The picture is in RGB mode

RGB模式的图片输出时，RIP系统一般都会自动将其转换为CMYK模式输出。但其色彩质量会大打折扣，印出的成品色彩淡，不鲜亮，效果很不好。图片建议是在photoshop内将其转换为CMYK模式，若为扫描稿件，那么还需要经过校色这一道工序，图片才可使用。很多朋友在PS里面做文件的时候不会在意RGB和CMYK的格式。

When RGB mode pictures are output, the rip system will generally automatically convert them to CMYK mode output. However, the color quality will be greatly discounted, and the finished products printed are light in color, not bright, and the effect is very bad. It is suggested that the picture should be converted to CMYK mode in Photoshop. If the manuscript is scanned, the picture can only be used after the process of color calibration. Many friends do not care about RGB and CMYK formats when making files in PS.

实际上，彩色印刷不只是单纯的正常4色的印刷，有很多书刊上经常会出现各种专色撞出来的颜色，特别是有一种品红颜色，这个颜色是非常不好调的。

In fact, color printing is not just a normal four-color printing. There are many books and periodicals that often have different spot colors. In particular, there is a magenta color, which is very difficult to adjust.

还有很多人会用到专色，或者印刷完过水油，在彩色的基础上增加黑油墨的数量，不会改变混合色的色调，在降低颜色明度的同时也使彩度降低。

Many other people will use spot color or water oil after printing, and increase the amount of black ink on the basis of color, without changing the hue of mixed color, which will reduce the color brightness and also reduce the chroma.

一般来说，在四色印刷的技术中，图片的色彩是非常需要注意的一个问题了，所以，我们需要对四色印刷中的色彩问题加以重视。

Generally speaking, in the four-color printing technology, the color of the picture is a problem that needs attention. Therefore, we need to pay attention to the color problem in the four-color printing.

以上就是彩色印刷设计要注意的四点内容，希望能够给您帮助，您可以关注我们网站http://www.xinfengyinshua.cn咨询更多事项！

The above are the four points that should be paid attention to in color printing design. I hope I can help you. You can follow our website http://www.xinfengyinshua.cn Ask for more!