Specs
Delta E Check specs
Setup notes and briefing numbers for Delta E Check.
Delta E checkpoints on press
The working details for Delta E Check cover the measurement points used when checking whether colour is still landing where it should.
Delta E Check specs set out where readings are taken on the chart, which patches matter, and the tolerance the operator is checking against. For FastJET, Stormjet, and Skywalker units, that usually means noting the ink set, pass mode, heater state, and media in use before any numbers are compared. Inland dust and coastal moisture can shift behaviour between one run and the next, so the sheet must be read with the shop conditions in mind.
The setup notes stop random measuring at different points on the target. Each reading position needs to stay consistent across reprints, otherwise the Delta E result says more about the method than the printer. Teams often pin the specs beside the spectro so the same sequence is followed on day shift and night shift.
What the specs lock down
Delta E Check defines the working reference rather than giving a generic colour theory summary. It helps a print room record the same machine state, the same target area, and the same viewing logic when colour drift is being checked. That is especially useful when cartridge swaps or media changes have happened midweek.
Use these details alongside the matching machine record before you compare one result with another. ICC work starts from a test print on your usual roll, together with the RIP version you run. Bellville jobs should also note whether the reading was taken straight off the platen or after the sheet had settled.
- Patch positions listed for repeat checks
- Pass mode and heater state recorded
- Delta E notes tied to cartridge changes
SA shop conditions affecting readings
A reading taken in Johannesburg after a dusty production day may not behave like one taken in Durban with heavy humidity in the room. The specs matter because measurement only means something when the surrounding print conditions are noted properly. Older sites in Crown Mines or busy dispatch periods around OR Tambo can also affect when a stable check is actually possible.
Power interruptions matter if the machine has cooled down between the test print and the measured sheet. Coastal workshops may need longer settling time before readings are taken, while inland sites often need extra attention on sensors and nozzle health before the chart is printed. Those details belong next to the Delta E figure, not in someone's memory later.
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Briefing details to include
Send the Delta E value, the target name, the media, and the printer model when raising a colour question. Add a photo of the chart, note any recent cartridge change, and state whether the reading came before or after a cleaning cycle.
Keep the measured sheet with the machine settings used for that run. When the buyer or production lead asks why colour moved, the useful record is the printed target, the reading sequence, and the exact setup written on the day.
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