What a camera needs to see bleed on corrugated preprint
To see bleed on corrugated preprint, the color edge and the register marks must both be in view. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
To see bleed on corrugated preprint, the color edge and the register marks must both be in view. If you cannot see it, change the light or the resolution first. Do not loosen the threshold first.
If you cannot see it, change the optics first
Color runs past the edge, and the register marks still line up. If the picture cannot separate that, loosening the threshold only paints the barcode and the product name red. The color edge and the register marks must both be in view.
Optics
| Need | Enough looks like | Not enough looks like |
|---|---|---|
| The color edge and the register marks must both be in view. | Color runs past the edge, and the register marks still line up. | Only a blurry circle |
| About 3 pixels across | It shows steadily | It comes and goes, yet someone writes that it can be detected |
| The barcode and the product name are in view | The critical place is in view | Only the decorative edge is lit |
Try it on a sample
- Confirm the picture separates this: color runs past the edge, and the register marks still line up.
- Count about how many pixels it covers.
- If you cannot see it, change the light or the focus. Do not change the threshold.
