Digital BW, The Print

Thanks, Paul. eom.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@v...> wrote:
> Scott,
> 
> > I don't have a spectrophotometer, so the "numbers" don't have a 
lot
> > of meaning to me in terms of "real world" results.
> > 
> > I was wondering if when you viewed these prints side-by-side, you
> > could see a difference with your "control" print...
> 
> No, I'm trying to predict the future based on very initial fade test
> results.  That's why I'm having to fight the tiny spectrophotometer
> variances.  That's also, perhaps, one reason Wilhelm runs the tests 
all the
> way out to a 30% fade.  But, that just takes too long for me.  
> 
> So, while I will continue this test, I've found pigments tend to 
fade in a
> rather linear fashion.  In the past the major exception was the 
burning off
> of any dyes that were in the mix.  (OBAs are, in effect if not 
technically,
> dyes also.)  In the past, I'd see those results in 1/12 the time 
(100 hours
> with a light half the brightness).  Since the current generation of 
pigs has
> no dyes in the ink, the "initial" (600 hour) fade rate results are 
probably
> reasonably indicative of longer term performance.  I'll start 
reacting to
> what I've seen now, even as I extend the test.  I'll also throw in 
a few
> more test strips (for example, OEM ink with a rip versus with AB&W 
printing)
> and take out other test so that I get more information from the 
next phase.
> I do this mostly to calculate what my next move will be; the 600 
hour mark
> is just the point at which I've found the results are accurate 
enough to
> make initial decisions as to that next move.
> 
> Paul
> www.PaulRoark.com