Digital BW, The Print

Steve-

1.96 Dmax for the black ink on Photo Rag sounds great.
Is this because their black ink has dye in it to
acheive such a high Dmax, or is this ink a pigment ink
with some new technology that allows it to reach this
Dmax without dye?

-John

--- Steve Kale <stevekale@...> wrote:

> Firstly can we please not turn this into another
> Nanoo Nanoo session?  Thanks!  :-)
> 
> I thought I'd share some initial testing I have done
> with these inks while we wait for 
> longevity information.  The testing I've done thus
> far is really only around gamut and ink 
> densities.  Now that I have profiles up and running
> I'm looking forward to printing 
> additional, more interesting, images.  All this is
> very preliminary as I loaded up my 2100 
> printer yesterday.  Rather than post a big blurb
> here with too many numbers, I have typed 
> up my results and included the ICC profiles in a
> folder which can be downloaded here:
> 
>
http://homepage.mac.com/stevekale/stevekale2/FileSharing37.html
> 
> (Hopefully Gretag will recognise that it's not my
> intent to share the profiles per se but 
> rather to post them so that people can make gamut
> comparisons.)
> 
> A couple of brief comments.  The inks are not a
> pancea for all the issues inkjet faces 
> today.  They behave very very well on some papers
> and "normally" on others, as the results 
> I've posted show (and Shilesh has posted prior to
> me).  Their gamut on my 2100 performs 
> better than my 4800 with K3 (MIS Eboni rather than
> Epson MK) in some areas but not in 
> others.  (I can't show a direct apples to apples
> comparison because the Nanochromes do 
> not have an LLK and I am not prepared to load them
> into my 4800 just yet.  I'd like to see 
> longevity tests before considering that.)  You can
> make your own gamut comparisons with 
> Colorsync Utility.  The black ink performs very well
> on HPR308 with a dMax of 1.96.  The 
> same ink achieves a dMax of 2.32 on EPSG.   (Note,
> you'll see I picked up the wrong 
> column for EPSG in the text of the pdf - I'll fix it
> when I can.)  Even if only this black ink 
> performs well in longevity tests it would be an
> interesting consideration for all the x800 
> series printer owners.  We'll have to wait and see. 
> There are some problems though in 
> using an ink which very quickly hits its density
> peak with the Epson driver with its ink 
> limits and linearization calibrated for completely
> different inks.  I'd be interested in 
> feedback on this issue once people have had the
> chance to look at the tests I've done.
> 
> I look forward to any feedback on the tests I've
> done to date.
> 
> Cheers
> 
> Steve
> 
> 
> 
> 
> 
> 
> 


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