Dots are the pixels that make up the dot image. The density and color of the original can be reproduced by changing the area and/or amount of ink.

Consecutively tuned images are reproduced using images composed of dots, which is a commonly used copying method. When copying a continuous original, the continuous-density image is converted into a half-tone image consisting of halftone dots through a screen printing process.

Prints such as lithographic printing and letterpress printing use dot-line images to reproduce continuous-tone images. Because only the ink and ink are not on the layout, two layers, black and white, are reproduced. In the case of the same amount of ink, dots of different sizes can be adjusted. The total amount of ink on the unit area; when the number of dots in the unit area is the same, the dot size is different, and the inked area rate is also different. The smaller the dot, the smaller the inked area rate and the lower the density.