Digital BW, The Print

see this article:

http://www.kcbx.net/~mhd/2photo/digital/colbw.htm

there are differences in the color channel information from a rgb 
scan of a b&w negative... are they useful???  maybe, it probably 
depends on your scanner... if one channel is noiser than another 
channel mixing that down would help your image quality... and I can't 
image how equal mixing would increase noise... but again, maybe for 
some scanners...

I scan directly into 16-bit greyscale format myself though...

mark

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul D. 
DeRocco" <pderocco@i...> wrote:
> > From: Cat [mailto:ratzmataz2004@y...]
> >
> > I would like to know your opinoins about scanning b&w negatives: 
is
> > there any difference (except file dimension!) between scanning 
them
> > in colour, using mixer channel and then print, and scanning in b&w
> > mode, convert to rgb and then print?
> 
> No. There's no color information at all in B&W negatives. Playing 
with the
> Channel Mixer knobs (keeping their sum equal to 100) will have no 
effect on
> the image, other than possibly to increase the noise, so you might 
as well
> let the scanner combine the R, G and B for you.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...