When printing your cards, MOO uses a digital halftone CMYK (Cyan, Magenta, Yellow, and Black) printing process. This means we use small dots of these 4 inks to produce all colors. Our printer mixes and overlaps grids of these dots at varying sizes and distances from each other to create the illusion of tones.
Lighter colors use fewer or smaller dots, as the paper showing through is what lightens the color. The dots being further apart means they are more visible and can result in thin lines and the edges of shapes or letters to start to look broken when reviewed close up. We recommend using thicker lines and darker colors whenever possible, as larger dots will be used to fill the white space of the paper resulting in a more consistent appearance.
You can see some close-up photography of our sample cards below: