QTR-Quadtone RIP

I've been working with my wife's Epson 380 printer to see if it might be worth getting a 1400 
later on.  So far I've made two profiles for the 380 using the OEM Claria inks and the prints 
are surprisingly good.  The first was a BO profile for Harman FBG.  The second profile (380-
Claria-EPGPP-2880 for Epson Premium Glossy) that I just added to the Files>Curves>Epson 
R380 folder uses a little bit of CMY ink to generate a composite midtone gray that helps 
smooth out the midtone grain and improves neutrality.  I would be interested to know if 
these profiles will also work with the Epson 1400 printer.

--- In QuadtoneRIP@yahoogroups.com, "Carl Schofield" <list@...> wrote:
>
> I've been working with my wife's Epson 380 printer to see if it
might be worth getting a 1400 
> later on.  So far I've made two profiles for the 380 using the OEM
Claria inks and the prints 
> are surprisingly good.  The first was a BO profile for Harman FBG. 
The second profile (380-
> Claria-EPGPP-2880 for Epson Premium Glossy) that I just added to the
Files>Curves>Epson 
> R380 folder uses a little bit of CMY ink to generate a composite
midtone gray that helps 
> smooth out the midtone grain and improves neutrality.  I would be
interested to know if 
> these profiles will also work with the Epson 1400 printer.

Thanks a lot Carl!

I can't help you about R1400, but I'll try your curves ASAP!

Andrea

Hi Carl,

I tried yesterday to print a grey ramp )I had not much time...) using
your 380-Claria-EPGPP-2880 profile. Comparing to my BO profile, it
seems  a bit smoother on the darks grey (the part where M and Y inks
are used), but there there is a little bit of color cast, toward magenta.

Anyway, I'll do more tests.

Andrea
http://www.andreaolivotto.com

Yes, there is still a slight amount of metamerism when the Y ink is  
used, and although it is noticeable in gray ramps it is not bad at  
all in normal prints.  Should be dead neutral in daylight and  
slightly warm/selenium toned look under incandescent lighting.  At  
least there is no ugly green/blue shift.  The Y limit is currently  
set at 3 and you could decrease it further although that would tend  
to cool the grays somewhat.  Pity that Epson didn't make a 7 color  
Claria printer with a light gray ink.  After seeing these brilliant  
B&W Claria prints it's hard to go back to pigments on glossy papers.

Carl

On Oct 30, 2007, at 7:53 AM, vtube75 wrote:

> Hi Carl,
>
> I tried yesterday to print a grey ramp )I had not much time...) using
> your 380-Claria-EPGPP-2880 profile. Comparing to my BO profile, it
> seems  a bit smoother on the darks grey (the part where M and Y inks
> are used), but there there is a little bit of color cast, toward  
> magenta.
>
> Anyway, I'll do more tests.
>
> Andrea
> http://www.andreaolivotto.com

--- In QuadtoneRIP@yahoogroups.com, "Carl Schofield" <list@...> wrote:
>
> I've been working with my wife's Epson 380 printer to see if it
might be worth getting a 1400 
> later on.  So far I've made two profiles for the 380 using the OEM
Claria inks and the prints 
> are surprisingly good.  The first was a BO profile for Harman FBG. 
The second profile (380-
> Claria-EPGPP-2880 for Epson Premium Glossy) that I just added to the
Files>Curves>Epson 
> R380 folder uses a little bit of CMY ink to generate a composite
midtone gray that helps 
> smooth out the midtone grain and improves neutrality.  I would be
interested to know if 
> these profiles will also work with the Epson 1400 printer.


Hi Carl, I tried your curve an PGPP and UPGPP with my R265, it works
well and the test prints are a bit warmer than using just BO, so good.

I notice that there is a visible discontinuity (a step) near the deep
shadows, visible in the graph of the curve in QTR and in a print of a
"circular gradient", like the test images on NorthLight site:

http://www.northlight-images.co.uk/article_pages/black_and_white_test.html

http://www.northlight-images.co.uk/downloadable_1/bw_lin_test_1.zip


Andrea

Andrea,

I didn't spend much time with this curve, so perhaps it needs to be  
tweaked a little.  You could also try to re-linearize for your  
printer and see if that helps.

Carl Schofield
http://photos.schophoto.com




On Jan 11, 2008, at 4:20 AM, vtube75 wrote:

> --- In QuadtoneRIP@yahoogroups.com, "Carl Schofield" <list@...> wrote:
>>
>> I've been working with my wife's Epson 380 printer to see if it
> might be worth getting a 1400
>> later on.  So far I've made two profiles for the 380 using the OEM
> Claria inks and the prints
>> are surprisingly good.  The first was a BO profile for Harman FBG.
> The second profile (380-
>> Claria-EPGPP-2880 for Epson Premium Glossy) that I just added to the
> Files>Curves>Epson
>> R380 folder uses a little bit of CMY ink to generate a composite
> midtone gray that helps
>> smooth out the midtone grain and improves neutrality.  I would be
> interested to know if
>> these profiles will also work with the Epson 1400 printer.
>
>
> Hi Carl, I tried your curve an PGPP and UPGPP with my R265, it works
> well and the test prints are a bit warmer than using just BO, so good.
>
> I notice that there is a visible discontinuity (a step) near the deep
> shadows, visible in the graph of the curve in QTR and in a print of a
> "circular gradient", like the test images on NorthLight site:
>
> http://www.northlight-images.co.uk/article_pages/ 
> black_and_white_test.html
>
> http://www.northlight-images.co.uk/downloadable_1/bw_lin_test_1.zip
>
>
> Andrea
>


[Non-text portions of this message have been removed]

--- In QuadtoneRIP@yahoogroups.com, Carl Schofield <list@...> wrote:
> Andrea,
> 
> I didn't spend much time with this curve, so perhaps it needs to be  
> tweaked a little.  You could also try to re-linearize for your  
> printer and see if that helps.

I created a curve for BO using only my eyes and comparing the result
to other curves, but I haven't got any instrument. Even this problem,
I will try.

I just saw you photo site: beautyful photos, best compliments!

Andrea