QTR-Quadtone RIP

In order to diagnose some banding problems I'd like to print separate 
patches of each ink channel. I'd like to do this using a particular qtr 
curve rather than in calibration mode (or with epson driver). Is that 
possible?

thanks
Howard

-- 
Howard Shaw
glassman@...
www.howardshaw.org

--- In QuadtoneRIP@yahoogroups.com, Howard Shaw <glassman@...> wrote:
>
> In order to diagnose some banding problems I'd like to print separate 
> patches of each ink channel. I'd like to do this using a particular qtr 
> curve rather than in calibration mode (or with epson driver). Is that 
> possible?

I had been wondering the same thing.  For example, what if I want to
run a purge pattern on *only* one ink channel.   The normal purge
patterns can't really do this, but I assume that QTR could.

F_P

Howard Shaw wrote:
> In order to diagnose some banding problems I'd like to print separate 
> patches of each ink channel. I'd like to do this using a particular qtr 
> curve rather than in calibration mode (or with epson driver). Is that 
> possible?
> 
> thanks
> Howard
> 
The QTR target for all channels to base the partitioning on 
isn't telling enough ?

-- 
Met vriendelijke groeten, Ernst


|  Dinkla Grafische Techniek  |
|     www.pigment-print.com    |
|             ( unvollendet )            |

ferdinand_paris wrote:
> --- In QuadtoneRIP@yahoogroups.com, Howard Shaw <glassman@...> wrote:
>> In order to diagnose some banding problems I'd like to print separate 
>> patches of each ink channel. I'd like to do this using a particular qtr 
>> curve rather than in calibration mode (or with epson driver). Is that 
>> possible?
> 
> I had been wondering the same thing.  For example, what if I want to
> run a purge pattern on *only* one ink channel.   The normal purge
> patterns can't really do this, but I assume that QTR could.
> 
> F_P

It's easy enough to close channels and keep one open at 100%.

-- 
Met vriendelijke groeten,Ernst


|  Dinkla Grafische Techniek  |
|     www.pigment-print.com    |
|             ( unvollendet )            |

Ernst Dinkla wrote:
> Howard Shaw wrote:
>> In order to diagnose some banding problems I'd like to print separate 
>> patches of each ink channel. I'd like to do this using a particular qtr 
>> curve rather than in calibration mode (or with epson driver). Is that 
>> possible?
>> 
>> thanks
>> Howard
>> 
> The QTR target for all channels to base the partitioning on 
> isn't telling enough ?
> 
Well I'm seeing (vertical) banding on my 7600 in a particular low key 
image but not in the ink separation target in calibration mode. The 
image prints fine on another printer.

Howard

Howard,

You can create a very quick and simple curve for any ink, or 
combination of inks.  Open the Curve Creation interface, select a 
single ink and use a Plot List.  For your chosen ink, select Load 
Curve, then click the curve box and the "Point List" tab.  Enter points 
of 0,0 and 100,100.  This will create a straight line curve that will 
print out the full tonal range from 0 to 100% ink.  It won't be 
linearized, and ink limits will be high, but it is a good way to create 
a simple curve for any ink.  

I have used this to print a 21 step grayscale and to determine ink 
limits for just the black channel.  I also have created these to help 
blow out the lines of a specific color in my 4000 when it was clogged.  

Lou

--- In QuadtoneRIP@yahoogroups.com, Howard Shaw <glassman@...> wrote:
>
> In order to diagnose some banding problems I'd like to print separate 
> patches of each ink channel. I'd like to do this using a particular 
qtr 

> curve rather than in calibration mode (or with epson driver). Is that 
> possible?
> 
> thanks
> Howard
> 
> -- 
> Howard Shaw
> glassman@...
> www.howardshaw.org
>

Howard Shaw wrote:
> Ernst Dinkla wrote:
>> Howard Shaw wrote:
>>> In order to diagnose some banding problems I'd like to print separate 
>>> patches of each ink channel. I'd like to do this using a particular qtr 
>>> curve rather than in calibration mode (or with epson driver). Is that 
>>> possible?
>>>
>>> thanks
>>> Howard
>>>
>> The QTR target for all channels to base the partitioning on 
>> isn't telling enough ?
>>
> Well I'm seeing (vertical) banding on my 7600 in a particular low key 
> image but not in the ink separation target in calibration mode. The 
> image prints fine on another printer.
> 
> Howard

Well you could edit the suitable separation image file (7 
channels) that it resembles a low key image. Say take the 
tone range to 1/3 of the original with PS curves and save 
that with the same name. Of course you kept the original 
file in another map to reinstall it when the experiment is 
done. The files are in the bin map of QTR's program files.


-- 
Met vriendelijke groeten,Ernst


|  Dinkla Grafische Techniek  |
|     www.pigment-print.com    |
|             ( unvollendet )            |