Digital BW, The Print

HI Roy


Peter miles wrote: <big snip>
>> Is there something in  my "quadtone curve descriptor file" That would cause
>> excessive ink loading?
>>
 
<Roy Harrington wrote>
> Peter,
> 
> Looking at your parameters here I'd say you are really over saturating
> the paper. I have an 1160 -- although it's a VM ink set not a quad set
> such as piezo.   First your ink limits seem very high.  I use limit=70 with
> the boost_k up to 90 or 100.  So K,C,M,Y = 70 and BOOST_K=100.
> Second the GRAY_OVERLAP is very high -- basically meaning 150% of the
> ink (based on their ink limit).   I use GRAY_OVERLAP=0 now.  Once
> you change these values you won't have such huge dot gain and the
> GRAY_VAL numbers will need to change.   You should do the ink calibration
> again with these lower ink limits and I'd expect instead of 30, 5, 2.8  they
> will be more like 45, 10, 5.
> 
> Roy


Thanks for that. I've just finished testing two new ink description
settings, one with the 0 GRAY_OVERLAP but the old high ink limits and one
with 0 GRAY_OVERLAP with 70% ink limits.
No sign of paper rippling at all with the 70%, 0 GRAY_OVERLAP setting
[D-max dropped from 1.66 to 1.62].

Much Thanks Roy for for all your help.

Kind Regards
Peter Miles