What to adjust first when edge wave shows on a corrugated preprint
When edge wave shows on a corrugated preprint, condition the board or check the humidity first. Do not only add pressure. Change only this one place. After the change, look again in the same spot. The sheet edge waves, and local register and wrinkles follow it.
When edge wave shows on a corrugated preprint, condition the board or check the humidity first. Do not only add pressure. Change only this one place. After the change, look again in the same spot. The sheet edge waves, and local register and wrinkles follow it.
Move one thing first
Stop if the wave pushes type or a barcode out of tolerance. On a corrugated preprint, if it already hits the barcode or the large product name, stop before you adjust. Do not try it while the job runs. A shift of register across the whole sheet is a lay problem, not the sheet edge.
Order
| Do first | Do not yet | Why |
|---|---|---|
| Condition the board or check the humidity first. Do not only add pressure. | Change ink, pressure and speed together | Change three things at once and you will not know which one worked |
| It has already landed on the barcode or the large product name | Try it while the job keeps running | Scrap will keep going |
| Note the board batch and how long it was stacked. | Only say that you already adjusted it | The next shift cannot pick it up |
Leave this when you are done
- Condition the board or check the humidity first. Do not only add pressure.
- In the same spot, check whether the edge wave has eased.
- Note the board batch and how long it was stacked.
