Digital BW, The Print

Helene,

thanks for the kind words!....  

Adding to what Robert and Carl have already said: banding of this sort is not 
likely to be profile related or even software related (dither etc). Possibly the 
black head is doing something that is exaggerated by the profile, but not 
caused by it. 

If you were able to open the profile in IJC, you would see that at 100% there 
is very little gray running and nothing else (with the WARM profile). With other 
profiles/workflows it's possible that all jets are firing to some extend and that 
would hide whatever the black head is doing. 

Eventually I may upload single-jet profiles for troubleshooting purposes, but, 
of course, if you have IJC you can just choose to automatically print each of 
the active inks in a chosen profile separately as an individual grayscale. You 
can then isolate the problem better. For example in the case of a 2200 WARM 
profile, you would automatically get two grayscales printed - the gray ink first, 
and below it the black ink - and you can then see if one head is banding and 
the other not.

I use this all the time to check my printers before making prints. The nozzle 
checks don't tell the whole story. They could show clean,  but a certain head 
may band. Runnning head cleanings sometimes solves the banding, even 
though nozzle checks continue to look clean. The easiest way to check 
afterwards is to run the IJC separate-ink scales again. Besides banding, they 
also show where an ink starts and ends and how it behaves across the scale. 
They serve to verify what the profile is doing. 

Regarding your question about the shipping profiles: IJC / OPM are not 
meant to encourage the use of canned profiles. They ship with some as 
examples and some just because those of us doing beta tests made them . But 
the idea is you can make your own - probably just by tweaking the shipping 
ones. Eventually we will be exchanging profiles (by uploading to the files 
section of this list), so a larger variety will be available. Even so, the 
maximum benefit of IJC comes from enabling you to fine tune a profile to your 
particular printing setup.

The supported printers are the same as the free OPM download. It is free not 
because it is a "limited" demo, but because it is based on Open Source code 
- like gimp print - and what you see is what you get (i.e. the free download is 
the complete, full functioning version) and its code is in the public domain. 
The "catch" if you will, is that without IJC (the for-pay part), you are limited to 
canned profiles and their limitations.


Antonis


Antonis




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "grdglass" 
<grdglass@a...> wrote:

> To eliminate my 2200 as the cause of the problem, I did a nozzle 
> check and printed my test image and step wedges through two other 
> printing applications.  These were all perfect and didn't exhibit 
> either of the OPM problems.
> 
> Any ideas what is happening? 

 
> A few other questions.  IJC, as purchased, will have a full array of 
> profiles, correct?  And, do you know which printers will be covered 
> besides those currently in the free OPM download?
> 
> Helene