Digital BW, The Print

I see no consistancy here between the ability to preview paper white
and/or ink black, and the presence of wtpt and/or bkpt tags in the
profiles.
For one odd example, I have 2 profiles here, one will preview paper
white but not ink black, the other will do the reverse, ink black but
not paper white. They both have wtpt tags, no bkpt tags.
This preview ability could also be derived from the LUTs I would
think. But why some and not others?
Another unknown. Along with how to make great art.
T
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@h...> wrote:
>
> 
> I suspect that this how it works -- that they are linked by the PS code.
> If anyone finds a counter-example I like to see it.  I don't think
any of this
> is documented so examples tend to be the best info.
> 
> I think there may be CM systems that don't handle BPC the way PS does.
> This may be why Epson provides profiles with it builtin.
> 
> Roy
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "John Moody" 
> <moodymz3@y...> wrote:
> >
> > I don't see any profiles that allow simulate paper color without
simulate
> > black ink unless they don't have a bkpt tag, so its moot.  Am I
missing
> > something?
> > An interesting example is SPR2400 ProofingSemimatte.icm which does
not have
> > a bkpt tag, yet SPR2400 PremSmgls PhotoRPM.icc does.
> > 
> > Does that suggest Epson knows most people don't want to simulate
paper black
> > while softproofing?  If any profile were to be used for
softproofing, I
> > would think ProofingSemimatte would be it.
> > 
> > Best regards,
> > John Moody
> > 
> > -----Original Message-----
> > From: DigitalBlackandWhiteThePrint@yahoogroups.com
> > [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of
Steve Kale
> > Sent: Tuesday, October 25, 2005 11:34 AM
> > To: DigitalBlackandWhiteThePrint@yahoogroups.com
> > Subject: Re: [Digital BW] ICC Soft Proofing -- The issue . . .
> > 
> > 
> > Yes but I think the thing we don't understand is why some profiles
allow
> > these operations and others don't. That is we need, ideally, to
figure out
> > what PS grabs from the ICC profile.
> >
>