Posters are often folded rather than rolled up in order to make transportation easier. When unfolded, a white line a appears in the scan where the crease/fold originally was. This fault also refers to the fold in the middle or edge of an image when the original book or magazine was not unbound, or any signs that the original page was not placed flat on the scan bed.

Creases can be fixed by unbinding books, and some photoshopping.

Updated by Aurelia about 15 years ago