Slur: lmage distortion caused by slippage of paper, plate, blanket, or a combination. Often occurred when printed with excess ink on a non-absorbent coated paper. To detect slur, a slur guide is included in most print control strips.

• 拖影:因为纸张，印版，胶布或它们一起滑动而引致的印纹变形。此外，在吸收性弱的粉纸施印，用墨过多，拖影亦经常发生。检测拖影，大多数的印刷控制条都没有拖影指引小块。