Question
What does '4/0' or '1/0' mean in envelope printing?
Answer
In envelope printing, these numbers describe how many ink colors print on each side, written as front over back.
| Notation | Front | Back |
|---|---|---|
| 4/0 | Full color (CMYK) | No printing |
| 1/0 | One ink color | No printing |
- The first number is the front, the second is the back.
- 4 means full four-color CMYK, good for photos and rich color.
- 1 means a single ink, such as black or one PMS spot color.
- 0 means that side is left blank.
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