Digital BW, The Print

Andreas,

With respect to UT v. PT fade, in my 2/03 300 hour test the PT-S 50% patch
dropped 0.01 density unit, the UT1 with the neutral curve was unchanged.
Both were on Photo Rag.  With the latest UT formula after 600 hours the UT1
neutral actually increased slightly in density, which is typical of the UT
carbon-tone prints, but is the first neutral print I've ever measured to
exhibit this.  

To put this in perspective, the PT and UT inks are both excellent -- way
ahead of the Epson Archival inkset in my fade tests, which I do not,
however, take to a 30% fade end point.  Keep in mind that I was responding
to an unsupported statement implying the PT inkset was better.  That is
simply not true.  I will go so far at to say that, as far as I know, there
is no neutral-tone inkset for desktop printers that can equal the fade
resistance of the latest neutral C86 EZ ink, and I'll send a test strip to
anyone who would like to do a comparison fade test.  (My goal is to beat the
silver print.)

I agree with you that a single midtone hue measurement does not mean that
the "neutral-selenium" inkjet prints are equal in look to a silver print.
There are obviously more variables.  However, the PT-S and UT-N hue targets
are about the same.  

One of the inkjet problems has been that the black pigments are warm,
whereas the lightly-selenium-toned silver print shadows get cooler.  The
inksets tend to get cooler at about 75%, but on matte paper there is, so
far, no way to stop a warm cross-over as one reaches the deep shadows, where
the black ink tone takes over.  Eboni and PT-Museum are about as good as
matte black gets.  However, on glossy paper, the UT2 & UT7 can achieve a
cool 100% black because they use the dark grays to generate it.  The dark
cold gray can keep the 100% neutral or even cool.

As to the price comparisons, I look at bulk ink prices.  The PT-S 4 oz. cyan
bottle is $44.  The UT-FSN 4 oz. bottle is $18.

The per-print ink costs when refilling the "refill-friendly" carts with MIS
UT ink is extremely low.  I do not recommend bottom filling/re-filling of
older desktop carts, but I find my 7500 carts and the newest C86 and 2200
carts to be extremely easy to refill.  (I'm not sure if MIS is still
shipping the older, not-so-friendly carts for these machines.  I'll check
and post the answer I get.)

Paul
www.PaulRoark.com 

_____________________________






-----Original Message-----
From: aaltenmueller [mailto:a.altenmueller@...] 
Sent: Tuesday, November 16, 2004 1:34 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] comparison hue of piezotone selen - UT-FSN



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
<paul.roark@v...> 
wrote:
> >> ...so can I assume that you see no difference between Piezo and 
> >>UT-FSN then?
> 
> >...
> >I do know piezotone is probably the best product but ...
> 
> No, the UT family does better in fade tests, is glossy compatible, and
> cheaper.  That puts it ahead in my book.
> 
> The hues are generally matched in that both follow the standard of the
> lightly toned silver print, with spectrophotometer readings characterized
by
> midtone cyan = yellow, and magenta 0.01 density unit higher.
> 
> Paul
> www.PaulRoark.com



Better in fade tests?
Please tell the link where to read it!

Regarding the hue:

IMHO the overall look of an BW-print can't be described by a single midtone
measurement.
Equally measured the look can be quite different.

The prices:

For small carts and bulk ink you are right, but not for the larger 7xxx and
9xxx carts.


Andreas






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