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Problems with Eboni ink curves & QTR

Problems with Eboni ink curves & QTR

2012-09-17 by bakerstrten1

I have an Epson 1430 with Eb 6 inks.  I can use the Epson driver and the profiles from Paul Roark to make reasonable prints.  However when I use the curves downloaded from the same source the prints show banding and seems to show excessive contrast.  

I am saving the file as a grey gamma 2.2 tiff and then printing it using the appropriate EB6 curve but without smooth transitions between tones.  Could there be something I am doing wrong?

Thanks, in anticipation.

Michael

Re: [Digital BW] Problems with Eboni ink curves & QTR

2012-09-17 by Paul Roark

Michael,

Curves and profiles would probably not, by themselves, cause banding.  The
curves, which are provided primarily so that people can make their own
custom ICCs using QTR's Create ICC-RGB, do often use a disproportionate
amount of yellow-position (2% Eboni) Eb6-Y.  If that channel was having
problems, those curves and the ICCs based on them probably would show that
problem more than the simple Epson driver and Color Control, gamma 2.2
printing.

So, my guess is that you are having problems with one or more of the
channels.  Be sure the nozzle check is perfect.  With Eboni-6, a clog in
one of the dilute inks is unlikely.  If there is a gap it is probably an
air bubble in the outlet of the cartridge.  If the inks were just loaded,
sometimes letting it sit overnight is the best fix.

Good luck with the system.

Paul
www.PaulRoark.com

On Mon, Sep 17, 2012 at 1:30 AM, bakerstrten1 <bakerstrt@...> wrote:

> **
>
>
> I have an Epson 1430 with Eb 6 inks. I can use the Epson driver and the
> profiles from Paul Roark to make reasonable prints. However when I use the
> curves downloaded from the same source the prints show banding and seems to
> show excessive contrast.
>
> I am saving the file as a grey gamma 2.2 tiff and then printing it using
> the appropriate EB6 curve but without smooth transitions between tones.
> Could there be something I am doing wrong?
>
> Thanks, in anticipation.
>
> Michael
>
>  
>


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