Digital BW, The Print

If I may ask, why is it important to work in grayscale?  I usually 
scan B&W as RGB as it seems to take better advantage of my Nikon ls 
2000 and then work in desaturated rgb unitil I am ready to print. I 
have always assumed that even desaturated rgb provides more data 
points than grayscale.. I could certainly go right to grayscale after 
desaturating.  This is a real question, not a comment.  (I use Adobe 
rgb.)

Steve


--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
> Steve,
> 
> Work in grayscale, not RGB.  Then you convert to RGB *only* for 
printing.  I
> never save the RGB file.  As soon as the printer is going, I delete 
it.  If
> you work in g/s, you can convert to any RGB space you'd like.  If 
you are
> sending files to a lab, send them in g/s and let the lab convert to 
their
> space.
> 
> Paul
> ________________________
>   -----Original Message-----
>   From: scrber [mailto:stephen.bate@m...]
>   Sent: Thursday, September 26, 2002 8:11 AM
>   To: DigitalBlackandWhiteThePrint@y...
>   Subject: [Digital BW] Re: -MIS VM problem - AdobeRGB vs sRGB ?
> 
> 
> 
>   Thanks Paul.  Do you know if there is a way that I can use 
AdobeRGB
>   as a working space, but then 'convert' files to sRGB when I need 
to
>   send them out to the lab?
> 
>   Is AdobeRGB only necessary for your curves when the final 
conversion
>   to RGB for print is necessary (ie could I work in sRGB all the 
time,
>   then prior to applying the curves on the print file, convert to 
Adobe
>   RGB)?
> 
>   Or I am making all this orribly complicated???
> 
> 
>   PS.  Thanks for the revisted 1290 W1 curve - I will let you know 
how
>   I get on and will send you a scan.  I'd be surprised if the 
originals
>   were corrupted - I got them on 4 seperate occaisons and they are 
all
>   the same.
> 
>   steve.
> 
> 
> 
>   --- In DigitalBlackandWhiteThePrint@y..., "Paul Roark"
>   <paul.roark@v...> wrote:
>   > Steve,
>   >
>   > As it relates to the MIS curves, the sRGB space appears to 
simply
>   compress
>   > the dark tones slightly compared to the Adobe RGB.
>   >
>   > Paul
>   > _____________________________
>   >   -----Original Message-----
>   >   From: scrber [mailto:stephen.bate@m...]
>   >   Sent: Thursday, September 26, 2002 12:35 AM
>   >   To: DigitalBlackandWhiteThePrint@y...
>   >   Subject: [Digital BW] Re: -MIS VM problem - adobeRGB vs sRGB ?
>   >
>   >
>   >   A generic colour space question.
>   >
>   >   I print colour to a labs lighjet via digital files (colour 
space /
>   >   profile must be sRBG).
>   >
>   >   I print B&W to an Epson 1290 with MIS VM and CIS.  Pauls 
Curves
>   are
>   >   supposed to be used with an AdobeRBG colour space.
>   >
>   >   I am not too hot on the whole colour management schebang yet.
>   But as
>   >   a lot of my files are colour (convertded to B&W), I wanted to 
use
>   the
>   >   same profile for all.
>   >
>   >   So...Any idea what happens with the PR curves when I use 
sRBG, or
>   >   vice versa, if I send my digital files to the lab with an 
Adobe
>   RGB
>   >   profile?
>   >
>   >   Any way I can simplify my workflow - as the moment it is a
>   hotchpotch
>   >   of profile mismatches and conversions.
>   >
>   >   Thanks
>   >
>   >   Steve.
>   >
>   >
>   >   --- In DigitalBlackandWhiteThePrint@y..., "jim hayes"
>   <jimhayes@j...>
>   >   wrote:
>   >   > For the 2nd conversion from greyscale to RGB to prepare for
>   >   printing:
>   >   > It may be implied, but also make sure that you are not in 
your
>   >   editing
>   >   >  greyscale space (the greyscale space you use to get your
>   monitor
>   >   to
>   >   > match print, 20%dot gain, more likely a custom dot gain 
curve,
>   >   etc),
>   >   > and make sure that you are in the appropiate RGB space 
Paul's
>   calls
>   >   > out for your printer/OS combo. In most cases this is 
conversion
>   >   from
>   >   > the grayscale space of "gamma 2.2" to either "sRGB"
>   or "Adobe98".
>   >   >
>   >   > But I question if the first conversion from RGB to greyscale
>   would
>   >   not
>   >   > comb out your image data and cause posterization even 
before you
>   >   had a
>   >   > chance to work on it. Have to be checked anyway. Might be 
okay
>   if
>   >   you
>   >   > were in 16 bit mode.
>   >   > Jim H.
>   >   >
>   >   >
>   >   >
>   >   >
>   >   > --- In DigitalBlackandWhiteThePrint@y..., "Vincent Orlando"
>   >   > <orlandovl@h...> wrote:
>   >   > > Bob, what I found after many hours is if the scan picks 
up any
>   >   sort
>   >   > > of color, which it normally does, before printing change 
to
>   >   > grayscale
>   >   > > and back to rgb and you should be allright
>   >   > >
>   >   > > Vinny
>   >   > >
>   >   > >
>   >   > > --- In DigitalBlackandWhiteThePrint@y..., workmantx@a...
>   wrote:
>   >   > > > Vinny,
>   >   > > >
>   >   > > > Thanks for the information.  I'm going to be shooting 
and
>   >   working
>   >   > > with some
>   >   > > > chromogenic film shortly (Ilford XP2 super).  I'll scan 
as
>   RGB
>   >   and
>   >   > > wasn't
>   >   > > > sure exactly how my workflow should progress in PS 
before
>   >   applying
>   >   > > Paul's
>   >   > > > curves.
>   >   > > >
>   >   > > > Bob
>   >
>   >
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