Hi Roger,
As G7 fixes the density in the midtone, the measured TVI after G7
calibration is depending on the densities You print with.
Higher densities result to lower TVI.
So in your case the lower TVI could also be a result, that the G7
calibration print was made with slightly higher densities as former
press runs with "old TVI-method".
Regards
Jan-Peter
Roger Breton wrote:
Hi Gerry,
I'm all for G7. But I'm affraid of bringing it into the maintream.
I'm about to try it on a news web heatset process. But I can do it because
it is not a daily-type of newspapers that assume ISO-12647-3 type of
calibration.
The G7 process is an excellent method to manage
web newsprint print. I think
this would be a great opportunity for the newprint industry to improve and
control it's process with greater predictability.
I'm convinced of that too.
This process is successful due to the gray
balance and tone shape approach to
offset lithography.
Gery, does it make sense to say that the G7 method results on lower midtone
densities as opposed to traditional TVI methods of press calibration?
I recently conducted G7 calibration on #3 grade of coated paper in a web
heatset process and got 5% less TVI on CMY ay 50% as compared to the "old"
method.
Gerry Gerlach
Roger Breton
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