Digital BW, The Print

Hi all,

I am wondering if anyone has had this experience. I have been 
printing and noticed that my aRGB to ABW driver prints have been 
having a slight green cast for some time. I have been compensating 
for this by using the toning wheel to move toward the magenta (eg 
6h/-3v). Well, I just changed over to a new light magenta cartridge 
and whammo, all the prints were looking quite magenta and now 0h/0v 
looks fairly neutral on my prefered paper of EPSG where as before it 
had a slight green cast. I am sending aRGB files to the ABW driver 
with no color management from Photoshop as I always do. Also I have 
run nozzle checks frequently and there never has been any problem.

So Have people noticed that inks can loose their intensity in the 
cartridges? Mine probably has been in the machine for 6 months max 
if I had to guess. Can dye lots be this variable. Any thoughts from 
our fellow r2400 users? Will I have to readjust my toning everytime 
I switch a cartridge? Thanks for any help you can give.

If your carts have been in the machine for 6 months that's an indication 
of infrequent use. That leads me to think this is probably pigment 
settling. Next time it happens pull the carts out and shake them. 
Problem should go away.
--
Bruce Watson


Scott Jones wrote:

> Hi all,
>
> I am wondering if anyone has had this experience. I have been 
> printing and noticed that my aRGB to ABW driver prints have been 
> having a slight green cast for some time. I have been compensating 
> for this by using the toning wheel to move toward the magenta (eg 
> 6h/-3v). Well, I just changed over to a new light magenta cartridge 
> and whammo, all the prints were looking quite magenta and now 0h/0v 
> looks fairly neutral on my prefered paper of EPSG where as before it 
> had a slight green cast. I am sending aRGB files to the ABW driver 
> with no color management from Photoshop as I always do. Also I have 
> run nozzle checks frequently and there never has been any problem.
>
> So Have people noticed that inks can loose their intensity in the 
> cartridges? Mine probably has been in the machine for 6 months max 
> if I had to guess. Can dye lots be this variable. Any thoughts from 
> our fellow r2400 users? Will I have to readjust my toning everytime 
> I switch a cartridge? Thanks for any help you can give.

Hello Scott,

>So Have people noticed that inks can loose their intensity in the 
>cartridges? Mine probably has been in the machine for 6 months max 
>if I had to guess. Can dye lots be this variable. Any thoughts from 
>our fellow r2400 users? Will I have to readjust my toning everytime 
>I switch a cartridge? Thanks for any help you can give.

After 6 mos it may very well be some settling, as Bruce suggested. 
According to past threads re settling in other printers (typically the
larger models without moving carts), it tends to be the magenta that
does it.  

However, I've had a 2400 for almost a year now under regular and
frequent use, and have noticed a slight shift from one color cart to
another (I do ABW only).  I have attributed it to production batch
differences because I go through carts fairly often (I've averaged
about 1.6 carts/month over the past year) and I doubt settling would
be an issue.  In addition, I've noticed these slight color shifts
(nothing as dramatic as what you described) when changing LC and LM as
well, which are much more frequently changed (about 3:1 over C and M).  


Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm

Clayton, thank you so much for your typical fast and generous 
answer. My light magenta cart probably was not in there for 6 mo, 
but I have shaken all carts and with the new light magenta cart in 
place, all the toning is back to normal. On EPSG I think the tone is 
a tad cool/greenish. You and I seem to have the same curse in being 
able to distinguish extremely slight shade differences in the 
magenta/green scale. So Now I compensate with 2h/-1v on the toning 
wheel.

Thanks for your help and I will now shake all carts if they have 
been sitting for awhile!

Scott

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Clayton Jones" 
<cj@...> wrote:
>
> Hello Scott,
> 
> >So Have people noticed that inks can loose their intensity in the 
> >cartridges? Mine probably has been in the machine for 6 months 
max 
> >if I had to guess. Can dye lots be this variable. Any thoughts 
from 
> >our fellow r2400 users? Will I have to readjust my toning 
everytime 
> >I switch a cartridge? Thanks for any help you can give.
> 
> After 6 mos it may very well be some settling, as Bruce suggested. 
> According to past threads re settling in other printers (typically 
the
> larger models without moving carts), it tends to be the magenta 
that
> does it.  
> 
> However, I've had a 2400 for almost a year now under regular and
> frequent use, and have noticed a slight shift from one color cart 
to
> another (I do ABW only).  I have attributed it to production batch
> differences because I go through carts fairly often (I've averaged
> about 1.6 carts/month over the past year) and I doubt settling 
would
> be an issue.  In addition, I've noticed these slight color shifts
> (nothing as dramatic as what you described) when changing LC and 
LM as
> well, which are much more frequently changed (about 3:1 over C and 
M).  

> 
> 
> Regards,
> Clayton
> 
> 
> Info on black and white digital printing at    
> http://www.cjcom.net/digiprnarts.htm
>