What the G7 substrate color report cannot omit
The report writes ΔE00, the target paper white, the M condition, and the backing. Written as ΔEab, it does not count as this line. For substrate color difference, follow the job ticket. Don't rely on what this shift remembers.
The report writes ΔE00, the target paper white, the M condition, and the backing. Written as ΔEab, it does not count as this line. For substrate color difference, follow the job ticket. Don't rely on what this shift remembers.
Missing this, you cannot conclude
In G7, the substrate against the target commonly uses an upper limit of ΔE00 3.0. That is the paper or the material itself, not the ink solid. Don't use ΔEab 5 in place of this 3.0. Miss the conditions or the objects, and nobody else can check this conclusion.
Report side by side
| Item | Do this | Don't |
|---|---|---|
| Substrate color difference | The report writes ΔE00, the target paper white, the M condition, and the backing. Written as ΔEab, it does not count as this line. For substrate color difference, follow the job ticket. Don't rely on what this shift remembers. | Write only a feeling |
| A common miss | Don't hide a substrate miss with ink from a later process. If the paper is wrong, the gray balance later sits on the wrong paper. | Leave the wrong number standing |
| What to leave | The report writes ΔE00, the target paper white, the M condition, and the backing. Written as ΔEab, it does not count as this line. | Leave only a line that says pass |
Check before you file it
- Measure the unprinted material first.
- Confirm you are using ΔE00.
- If the paper is out, don't cover it with ink.
