For instance, when we have a solid field of very light magenta, and detail is printed in dark magenta on top, we tend to lose the dark dot against the light dot. This enhances printed halftones by hiding the halftone dot pattern of the detailed print and creating an overall image that appears almost continuous in tone. With the six-color approach, not only does image sharpness and resolution improve, but the smoothness of tonal transition is much better, too. Difficult colors, such as fleshtones, baked goods, watercolor washes, sky shades, and chrome and similar metals all benefit from the light tonal values added in dual-colorant printing. Printing with dual cyan and magenta colorants also increases the dynamic range of the images we reproduce.
Dynamic range is the difference between the lightest and darkest areas of the image.
Simply put, the blacks are blacker and the whites are whiter. Most printing has a maximum dynamic range of less than 2.0. We rarely achieve this in screen printing. Most of the time, our work is in the 1.6-1.8 range. This is why in the visible world, we see detail in shadows that is absent in our printed work.