How to tell edge scum from a lookalike on a corrugated preprint
On a corrugated preprint, separate edge scum: scumming spreads into the middle of the blank. It does not stay only on the edge. Until you can tell them apart, d...
Tagged: Dirty edges
On a corrugated preprint, separate edge scum: scumming spreads into the middle of the blank. It does not stay only on the edge. Until you can tell them apart, d...