What to adjust first when an ink-skin spot shows on a corrugated preprint
When an ink-skin spot shows on a corrugated preprint, check the ink fountain and the return first. Do not change the plate first. Change only this one place. After the change, look again in the same spot. It is a solid dark spot that wipes or lifts off.
When an ink-skin spot shows on a corrugated preprint, check the ink fountain and the return first. Do not change the plate first. Change only this one place. After the change, look again in the same spot. It is a solid dark spot that wipes or lifts off.
Move one thing first
If it lands on type or a barcode, stop. The rest follows the spot chart. 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 lint hickey has fibre in the middle; ink skin is a piece of dry ink.
Order
| Do first | Do not yet | Why |
|---|---|---|
| Check the ink fountain and the return first. Do not change the plate first. | 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 ink batch and how it was filtered. | Only say that you already adjusted it | The next shift cannot pick it up |
Leave this when you are done
- Check the ink fountain and the return first. Do not change the plate first.
- In the same spot, check whether the ink-skin spot has eased.
- Note the ink batch and how it was filtered.
