Hi Paul,
I am not sure whether I correctly understand your question.
Regarding reasonable DeltaE tolerances in daily business:
The DeltaE 5 of ISO 12647-2 are not too high as side effects need to be
taken into account:
- measurement differences caused by different spectrophotometers,
especially if you compare measurements of different brands (e.g. X-Rite
vs. GretagMacbeth)
- influence of paper color
If you print with preselected materials lower DeltaE is an option
However it's not easy to evaluate standard conformity of inks
correctly. This requires extremely expensive equipment (printability
tester, lab environment, ..) and the use of another international
standard: ISO 2846 not ISO 12647-2.
So all you can do in real live is printing on your production press and
compare with the aim valaues of 12647-2.
Regards,
Florian
Am 18.05.2005 um 20:30 schrieb Paul Sherfield:
Hi
What do the members of this list consider to be a reason Delta e
tolerance
for these inks, against the 12647/2 L a b process ink solid targets
and on a
'batch to batch' basis?
Regards
Paul Sherfield
The Missing Horse Consultancy Ltd
Telephone: 01442 871752
Mobile: 07899 906385
Apple Solutions Expert-Print & Publishing
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