Digital BW, The Print

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