Premium PSO tolerances
The tolerances in accordance with ISO-12647 (PSO) and the tighter tolerances for the Premium PSO certification are listed in the following table:
Deviation tolerances (Target value – OK sheet) |
Tolerances under ISO 12647-2 / process standard offset |
Premium PSO Tolerances |
---|---|---|
Tone value in highlight area |
Max. +/- 3 | Max. +/- 3 |
Tone value mid-tone | Max. +/- 4 | Max. +/- 3 |
Tone value in shadow area | Max. +/- 3 | Max. +/- 3 |
Spreading of TWZ (total amount of colour) of mid-tones (CMY) | Max. 5 | Max. 4 |
L*a*b* primary colours (CMYK) | Max. ΔE= 5 | Max. ΔE= 4 |
L*a*b* secondary colours (RGB) | Not specified | Max. ΔE= 6 |
L*a*b* tertiary colour (grey) | Not specified | Max. ΔE= 8 |
Fluctuation tolerances (Actual value OK sheet – production run) |
Tolerances under ISO 12647-2 / process standard offset |
Premium PSO Tolerances |
---|---|---|
Tone value mid-tone | Max. +/- 4 | Max. +/- 3 |
Tone value in shadow area | Max. +/- 3 | Max. +/- 3 |
Spreading of TWZ (total amount of colour) of mid-tones (CMY) | Max. 5 | Max. 4 |
L*a*b* primary colours (CMK) | Max. ΔE= 4 | Max. ΔE= 3 |
L*a*b* primary colour (Y) | Max. ΔE= 5 | Max. ΔE= 3 |
L*a*b* secondary colours (RGB) | Not specified | Max. ΔE= 4 |
L*a*b* tertiary colour (grey) | Not specified | Max. ΔE= 6 |