Since the colors are printed from cartridges that resembles an older carbon ribbon typewriter, each pass lays down a swath about .5 inches wide. Large color areas result in swathes of color with a slightly visible overlap. This is more noticeable with white than other colors. As with most all color printing, the cartridges are the primary colors and mix as required to get the colors needed. This is done with a very small dot pattern of each color in a separate pass.
Final pass is the black stuff.
This dot system results in a rather weak color saturation. The red has a very slight pinkish tint and it is hard to get a very dark blue. Yellow, even printed over white tends toward a pale color. The Corel Draw program has about a dozen different, industry standard color palettes to choose from. I have tried them all and getting really vivid color printing seems beyond reach.