When to stop for set-off on a corrugated preprint
On a corrugated preprint, stop if set-off marks type or a barcode on the back. Don't pass it if it hits the barcode or the large product name. The back carries the previous sheet's image, and you can often feel it.
On a corrugated preprint, stop if set-off marks type or a barcode on the back. Don't pass it if it hits the barcode or the large product name. The back carries the previous sheet's image, and you can often feel it.
First see whether it hit the critical spot
The back carries the previous sheet's image, and you can often feel it. Show-through soaks from the face to the back and looks lighter and softer. On a corrugated preprint, the critical spot is the barcode or the large product name. On decoration, with no defect sheet, don't invent a millimetre limit on the spot.
Check against this
| What you see | Call | Don't |
|---|---|---|
| The back carries the previous sheet's image, and you can often feel it. | Stop if the back marks type or a barcode. | Add ink or pressure just because you saw it |
| It lands on the barcode or the large product name | Don't pass this one | Wait for the next process to find it |
| Only on decoration, and there is no defect sheet | Keep a sample and confirm | Write your own millimetre number |
Do this on this pass
- Confirm it is set-off: the back carries the previous sheet's image, and you can often feel it.
- Check delivery, spray powder and drying first. Don't hide it by changing the face ink film.
- Note dryer temperature, the delivery pile and the metre count.
