What are fisheyes? / What causes fisheyes?
Fisheyes is a term used by label printers to describe randomly distributed ring-shaped marks that appear in most self-wounds. Fisheyes are a characteristic feature of self-wound films caused by air entrapment between the film and adhesive during the winding processes. As the roll builds up, the pressure on these ‘air pockets’ causes regional adhesive flow, creating the fisheye appearance.