Hi Fritz,
... The lab values you can reach are ery depending
on the ink you are using. Even ISO 2846 inks are showing differences in lab
values you can ahieve on the press.
I recognize that we should stop when Lab values are within ISO tolerances.
BUT, I don't see anything wrong working with ink suppliers to change the
shade of inks *when possible*.
In our shop, Magenta has unusual high chroma relative to SWOP2006_C3, for
instance. Same situation with yellow. I have two choices, work with those
inks or work with my supplier to modify the ink hues to be closer to the
target.
Why is that a bad idea? If it can be done.
MfG,
Roger Breton
I myself work in Asia and we just
recently
certified 4 companies according ISO 12647. They were using different inks
with different Lab values on the press, but all within the ISO tolerances.
ISO is indeed more than only running on coses possible Lab values. [...]