Washboarding on corrugated print
Washboarding is a light-and-dark stripe that follows the flutes. The liner is high on the flute tips and low in between, so the ink only kisses the peaks.
Checks
- If the stripe matches the flute pitch, it is the board, not a roller band.
- A lighter impression reduces crush but will not fill the valleys. The artwork and the plate have to live with the flute.
- Heavier liners bridge the flutes better than light ones. Check the board spec before you chase the ink.
- Do not raise pressure until the flutes crush. That trades a stripe for a weak box.
Materials in the directory
Compare containerboard, flexo inks.