A printing term which describes wet ink coming in contact with paper and spreading as it transfers. As the halftone dots are applied to the paper, the wet ink spreads, causing the dots to increase in size and halftones to appear darker. Paper weight, type of paper (coated or uncoated) and press type effect the amount of dot gain in a given printed piece. You may compensate for dot gain before a print job by lessening the density of the images in pre press.
An irregularity in the ink coverage of a printed area. Hickeys are caused by paper or pressroom dust, dirt, or pick out on the printing blanket, all of which prevents the ink from adhering to the paper surface.
All the activities involved in preparing a printing press for a print run, such as setting the registration, balancing the colour and adjusting the plates and blankets for paper thickness.