QTR-Quadtone RIP

Hey all-I am trying to get K7 inks up and running with QTR on a Windows 
machine. Nozzle tests show clear, test subjects are 8-bit grayscale 
tiffs with good tonal range.  I am trying for a good proof on Epson HW 
Matte and have so far had terrible posterization in tghe mid-tones.  

Any hints?

Also does anyone know why, when I place a 4x6 image on the bottom half 
of a page in QTR it insists on printing upside-down on the "top" half 
of the page?  A 4x6 image printed on the "top" half of an 8.5x11 page 
prints correctly.

It's all a mystery.

Ben Marks

On Sunday, October 29, 2006, at 10:09  AM, benmarks2003 wrote:

> Hey all-I am trying to get K7 inks up and running with QTR on a Windows
> machine. Nozzle tests show clear, test subjects are 8-bit grayscale
> tiffs with good tonal range.  I am trying for a good proof on Epson HW
> Matte and have so far had terrible posterization in tghe mid-tones.

Posterization with the K7 inks is almost always due to one or more 
carts not
working properly.   It's pretty easy of overlook a totally missing 
nozzle check
so I'd check that again.   With new carts that show no ink output its 
usually
because the vent hole is clogged.   When you pull the tab sometimes it
does not come completely off.


>
> Any hints?
>
> Also does anyone know why, when I place a 4x6 image on the bottom half
> of a page in QTR it insists on printing upside-down on the "top" half
> of the page?

Sounds like you just have to turn it around -- upside down on top is 
the same
as rightside up on the bottom.

Roy


> A 4x6 image printed on the "top" half of an 8.5x11 page
> prints correctly.
>
> It's all a mystery.
>
> Ben Marks
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com

I confirm Roy's suggestion. I tried these inks and Quadtone RIP last 
week with the posterization result. One of the cartridges had a blocked 
vent.

You can push the cartridges apart and peel off the part of plastic still 
covering the vent.

http://www.piezography.com/support/

Might help. My cartridges were slightly different than described, but 
easier to take apart rather than more difficult.

I tested on the R800. I'm still undecided as to whether or not this is 
how I will print b/w, but ...

Daniel


Roy Harrington wrote:

> On Sunday, October 29, 2006, at 10:09 AM, benmarks2003 wrote:
> 
>  > Hey all-I am trying to get K7 inks up and running with QTR on a Windows
>  > machine. Nozzle tests show clear, test subjects are 8-bit grayscale
>  > tiffs with good tonal range. I am trying for a good proof on Epson HW
>  > Matte and have so far had terrible posterization in tghe mid-tones.
> 
> Posterization with the K7 inks is almost always due to one or more
> carts not
> working properly. It's pretty easy of overlook a totally missing
> nozzle check
> so I'd check that again. With new carts that show no ink output its
> usually
> because the vent hole is clogged. When you pull the tab sometimes it
> does not come completely off.

--- In QuadtoneRIP@yahoogroups.com, "benmarks2003" <benmarks2003@...>
wrote:
>I am a long time piezography user - and a new and very satisfied QTR
user both with the K6 inkset on a 1280 and the Epson inkset on a 2200
- When you say "good tonal range" do you mean as the image appears on
the screen or in the histogram?  The linearized print models and
curves for the piezography products - both current K6 and K7 and
earlier inksets/profiles are very sensitive to "choppy" histograms as
well as clogged nozzles - curves and levels need to be used very
carefully- rather than use an adjustment layer - I will often use
curves on a copy of the original image ( or one channel) - paste it
back  in as it's own layer and adjust the opacity to blend - This may
be done several times to increase tonal range while maintaining a
reasonably smooth histogram - and avoiding posterization in printing.  - 

> Hey all-I am trying to get K7 inks up and running with QTR on a Windows 
> machine. Nozzle tests show clear, test subjects are 8-bit grayscale 
> tiffs with good tonal range.  I am trying for a good proof on Epson HW 
> Matte and have so far had terrible posterization in tghe mid-tones.  
> 
> Any hints?
> 
> Also does anyone know why, when I place a 4x6 image on the bottom half 
> of a page in QTR it insists on printing upside-down on the "top" half 
> of the page?  A 4x6 image printed on the "top" half of an 8.5x11 page 
> prints correctly.
> 
> It's all a mystery.
> 
> Ben Marks
>