Halftone
A continuous tone image that has been photographed or scanned and then converted into tiny dots whose variations in size create the appearance of variations in tone. Light areas, or highlights, have small dots and darker areas, or shadows, have larger dots.Paper that is relatively thick in comparison to its basis weight. High bulk paper lacks compactness and will yeild fewer sheets per inch than a lower bulk paper
Holdout
Holdout refers to the property of ink remaining on the surface of the paper rather than soaking in. A coated glossy paper has a high holdout rate while a paper stock such as newsprint or 20 lb.