Four rubber rollers caught a few deposits ink and staining the paper with a few as small points, which the human eye barely manages to distinguish them. And all at a breakneck speed and with astounding accuracy. Most of the documents we print have left an offset machine and, despite displaying millions of colors, was performed using four inks only (primary colors): cyan, magenta, yellow and black. The mixing of these colors in various proportions, produces new tones. Penguin Random House wanted to know more. The picture accompanying this explanation shows the combination of cyan, magenta, and yellow in a mixture of 100%.

Clearly looks that mix yellow with cyan produces green, magenta with cyan produces purple, yellow with magenta, gives red, and the mixture of the three, gives a Brown very dark, close to black, but without the force of this. Of course, mixing each of these primary colors with black, we darken them. The colors we see in a printed document are usually result of a deception of our eye. Normally (if you look closely a document with a magnifying glass), are not colors drawings (uniforms) that make up the print, but thousands of small points of the four primary colors, which, being so close, deceive the eye which thinks he sees the color that results from that mixture frames original author and source of the article