Digital BW, The Print

I have four techniques I use, one is Channel Mixer, which has already
been covered, the second is masking and layering different corrections
of the same scan, the third is to make two scans, one for the light
areas and one for the darks, and then mixing them in layers using a
mask to get the best of both and, finally, make two different
exposures on two frames of film.

Since I have switched to using color negative film (Kodak Portra 160)
from transparencies, I have seldom had to resort to the latter three
methods as my film almost always has a full spectrum of color data to
work with, even when shooting in full sun or with other extremely
contrasty lighting. Under those conditions, one or more of the color
layers almost always has the data I need to assemble a nice B&W, hence
the channel mixer is my preferred techinque.

For some examples of the kind of contrasty lighting I've been shooting
see
http://www.photoartsguild.org/web/tiki-browse_gallery.php?galleryId=4
. The first 3 images are from a feed mill with full sun on the windows
and the deepest shadows elsewhere - none of those required multiple
exposures nor multiple scans, just the right combinations of channels.

Frank