Screen dots are desirable for some prints, but not for others. Some photopolymer cliches cannot be produced without a screen, or only with a certain type of screen. With steel cliches, the screen is only exposed in for support of the doctor blade, to allow printing of larger motifs over an entire surface.

Blurred print is understood as the indistinct, hazy reproduction of lines or letters. This deficiency is often confused with distortion.