Digital BW, The Print

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@...]
  Sent: Thursday, September 26, 2002 8:11 AM
  To: DigitalBlackandWhiteThePrint@yahoogroups.com
  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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