QTR-Quadtone RIP

Hello,

i am trying to make good bw-prints with QTR, MIS Ultratone and Epson Pro3800.
My problem is, the prints has horizontal fine white lines, like bad nozzles or banding, but the nozzle check is always ok. Interesting is, these fine lines are only in prints i made with QTR, by resolution 1440 an 2880. When i am printing through Epson-Driver the quality of the prints is 100% ok, without the lines.

I tried different papers like Ilford Gold Fibre Silk or Harman Gloss FB AL, i tried to setup a wider gap to the printhead, no better prints. In 2880 resolution the prints are a bit better, but with a magnifying glass i can see the lines again.

What does QTR doing differently than the OEM-Driver, what produces these lines?

The main difference with QTR vs the Epson driver is that it uses less
color inks --
mostly the grays because that helps in avoiding metamerism.

I use a 3800 and don't see a problem but under magnification I guess you could
see the dots.  I use both of those papers with all factory settings so
if you've
changed settings I don't know if that could be the trouble.

Also, I'm a little unsure of the ink and profiles you are using since I
don't think MIS has Ultratone inks for the 3800.

Roy

On Tue, May 18, 2010 at 9:35 PM, kitara444 <kitara444@...> wrote:
> Hello,
>
> i am trying to make good bw-prints with QTR, MIS Ultratone and Epson Pro3800.
> My problem is, the prints has horizontal fine white lines, like bad nozzles or banding, but the nozzle check is always ok. Interesting is, these fine lines are only in prints i made with QTR, by resolution 1440 an 2880. When i am printing through Epson-Driver the quality of the prints is 100% ok, without the lines.
>
> I tried different papers like Ilford Gold Fibre Silk or Harman Gloss FB AL, i tried to setup a wider gap to the printhead, no better prints. In 2880 resolution the prints are a bit better, but with a magnifying glass i can see the lines again.
>
> What does QTR doing differently than the OEM-Driver, what produces these lines?
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

At least with the R2400 on a PC, there's also a difference in the 
pattern in which the heads lay down the ink. with the 2400, you can lift 
the lid and as long as you hold the front panel in place watch the ink 
being laid down as the head traverses the paper. With the Epson driver, 
ink is being laid down gradually over a broad stripe of the paper as the 
paper moves below it; using QTR the ink is laid down over a much 
narrower strip, building the density in that strip much more quickly. I 
occasionally see the same problem with QTR showing narrow white lines, 
repeated at very regular intervals while the Epson driver in ABW mode 
doesn't show these. My guess would be that the Epson driver is geared to 
laying down the ink in a pattern that hides a misfiring nozzle, by using 
the misfiring nozzle as part of a pattern in all horizontal lines, while 
the driver QTR uses assumes the heads are perfect, and lays down the ink 
from the faulty nozzle all in the same line.

I hope that makes some sense!

My solution is to give up and use the printer for other things (or use 
ABW if I need a monochrome print), and come back to printing with QTR 
another day ... not an ideal solution even for me.

I'm still using the OEM inks, as I haven't found suitable monochrome 
inks in the UK.

mike



On 19/05/2010 17:20, Roy Harrington wrote:
>
>
> The main difference with QTR vs the Epson driver is that it uses less
> color inks --
> mostly the grays because that helps in avoiding metamerism.
>
> I use a 3800 and don't see a problem but under magnification I guess you
> could
> see the dots. I use both of those papers with all factory settings so
> if you've
> changed settings I don't know if that could be the trouble.
>
> Also, I'm a little unsure of the ink and profiles you are using since I
> don't think MIS has Ultratone inks for the 3800.
>
> Roy
>
> On Tue, May 18, 2010 at 9:35 PM, kitara444 <kitara444@...
> <mailto:kitara444%40yahoo.com>> wrote:
>  > Hello,
>  >
>  > i am trying to make good bw-prints with QTR, MIS Ultratone and Epson
> Pro3800.
>  > My problem is, the prints has horizontal fine white lines, like bad
> nozzles or banding, but the nozzle check is always ok. Interesting is,
> these fine lines are only in prints i made with QTR, by resolution 1440
> an 2880. When i am printing through Epson-Driver the quality of the
> prints is 100% ok, without the lines.
>  >
>  > I tried different papers like Ilford Gold Fibre Silk or Harman Gloss
> FB AL, i tried to setup a wider gap to the printhead, no better prints.
> In 2880 resolution the prints are a bit better, but with a magnifying
> glass i can see the lines again.
>  >
>  > What does QTR doing differently than the OEM-Driver, what produces
> these lines?
>  >
>  >
>  >
>  > ------------------------------------
>  >
>  > Yahoo! Groups Links
>  >
>  >
>  >
>  >
>
> 
>
>
>
>
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-- 
mike finley photography
fine art photography and website construction
http://mypicks.efikim.co.uk
http://www.mikefinley.co.uk
http://www.roguegenecollective.com/Mike_Finley.html
http://www.efikim.co.uk

Hello Roy,

i am using this printer since one year with refillable cartridges an color inks from Lyson, the Photochrome V3. The quality of these were very good every time.
And i have an Epson 1400 with Ultratone 3D Inks, this is an universal BW-Inkset for Epson Photo- and Pro-Printers.

Two weeks ago i did setup the Pro3800 printer with the UT3D-Inks and made some QTR Curves for some Papers. 

I know your RIP and i know it is a very good Software, but what i do not understand is, when i am printing with the UT3D inks through the OEM-Driver via Photoshop and BW ICC-Profiles i can not see any banding.

When i am printing with your RIP (mostly with 1440 dpi super) the whole print has banding in the deeps. I do not understand why. Do i make a nozzle check, it is always ok.

Hmmh, i will make more testing prints, maybe i will find the cause of the problem.
Thank you for your reply!

Hi Mike,

what you wrote makes sense for me, i will check what you describe.
You can get the UT3D-inks from germany, the website is "www.farbenwerk.com".

Thanks for the link kitara - I'll look into it :)