Marks on printed material caused by dirt or foreign material during the printing process.

Imperfections in presswork due to dirt on press, trapping errors, etc.

Imperfections on a pinted sheet created during presswork caused by dirt on press, etc.

Defects in print appearing as specks of ink surrounded by a white halo.

a dust particle sticking to the printing plate or blanket which appears on the printed sheet as a dark spot surrounded by an halo.

in printing, spots or defects caused by foreign matter on the printing plate or blanket. Ink hickies appear as dark specks with a white ring around them; paper hickies appear as white specks.