From the experience value, the total amount of four color ink should be less than 300, unless you have a close cooperation with the output, printing sector. Do not believe? That good, please open Photoshop, to a New file, CMYK format, and then fill the most black black, in short, as far as you can! Then, open the info display board, the mouse on the screen, look at the CMYK info display, the four one hundred components added up, how much? 266! Far less than 300. You have to pay attention to this, too much of the four - color, is absolutely a bad thing. Okay, okay. Because the color of black ink limit, relative to the proportion of other colors will be increased, the image is not easy to be bright. What to do? (the total amount of ink when printing is limited, when the increase in black, is bound to reduce the proportion of other color. 

The best way is, of course, to manage the black channel as much as possible. When the image is converted to CMYK color space, it is accurate to set up the black channel, which will help to better describe the details in the area of shadow and contrast. Increase the amount of detail and increase the contrast can enhance the color saturation of the image, which will make your eyes feel the color of the image as if it is more than the actual color. 

We know that image color CMY inks will lack of contrast, blurred, especially in tone change region and dark region. Plus the black channel, the image will appear more clearly, the color will be more vivid. Because black to enhance the appearance of the contour effect, that is to say, the picture has played a role. 

However, a simple increase in black ink does not guarantee a perfect color. For professionals, it must be concerned with how much black, where and how to establish the best ink distribution balance between the channels. We have been in several articles mentioned the term "color parameter". Later we will specifically explain, please see the "Master Black channel, color parameter", but now, please read the section below, they are related. 

The total amount of black ink determines the total amount of black color in the image relative to the other three color plates. For most types of images, it is more appropriate to set the light black, which is equivalent to the traditional printing of the outline of the black, that is, only use the appropriate black to increase the contour and enhance the contrast and detail. If the color correction, you need to increase the amount of black image, you can increase the contour from the black start, so that it is conducive to maintaining the clarity of the image.