Digital BW, The Print

Paul  -
 
IP uses 'standard' ICC profiles.  The profiles are done by Colorbyte, and are provided free to IP users.  One could spend the money to have custom profiles made, but I've only heard of one or two people that thought the custom profiles were better.
 
The point I was trying to make is that while IP produces b&w prints that are dead on neutral with the gray files and gray ICC paper profiles, it can not, as is the case with Epson as well, produce a neutral b&w print from an RGB profile that has been converted to have all of the R, G, and B values equal.  In theory, this should be able to produce a neutral b&w print, but it doesn't happen.  Once the same file is converted to a gray file (Gamma 2.2 would be typical, I believe) and printed with a gray paper profile, all is well.
 
Tom Baker


"Paul D. DeRocco" <pderocco@...> wrote:
> From: Tom Baker [mailto:tbaker1328@sbcglobal.net]
>
> PS is probably not the cause of the color cast.  When Epson
> drivers a passed a file with the RGB values all equal, it can't
> produce a neutral print.For that matter, IP5.6 can't produce a
> neutral print with an RGB file where the values are equal, and
> the print is being made with a color profile.  I've heard this
> will change with IP6, but I haven't heard that from any
> authority.  (I'm talking about Ultrachrome inks.)

I'm interested in this, because I'm considering getting a RIP. What do you
mean by not being able to get a neutral print with a profile? Does IP not
use a conventional ICC profile to translate Lab to whatever it needs
internally? If not, does that mean that you have to use some built-in tool
for "profiling", rather than some 3rd party product like ProfilerPro?

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...



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