Since I have no clue what a DCG looks like, I have no personal experience
with what effects scanning one would have.
I can tell you, and the list, more specifically what challenges I've
encountered in scanning...
Scanning polaroid emulsion transfers posed problems when the transfer
surface was too highly reflective (eg silver mylar, gold matte board or tin
foil), or when the primordial goop (combination I think of gelatin, dyes and
chemistry) from the image stuck with the transfer - causing odd highlights
and pasty spots.
These looked horrible, to the point where I didn't want to do the photoshop
retouching I usually do for dustmarks and scratches etc.
My gums, cyanos and vd's were difficult primarily because they of their size
(15x22"), and my friend's scanner can only do up to 10x12 or something. For
these, I set my res, dimensions and contrast on the scanner, and scanned the
prints up to 3 times, tiling them together in photoshop. They don't look
half bad. The van dykes, if they are muddy to begin with, looked even muddier.
It is obvious that there are hundreds of people online who are doing
alternative printing. I have had a real hard time finding numerous sites
which contain alt-photo prints. polaroid transfers are common, and i've seen
some gums and cyanos on glenn cannon's page (i think it's him, going from my
head now)..among a few others.
I was very exited to find Jeff Stanfords page, devoted to gum printing, yet
to find digital approximations of the prints themselves (edges and all!).
My opinion on the topic: I would rather go out there and find lots of web
posted scanned images, in the complete understanding, as we all have it,
that there's nothing like the real thing (baby), than to see no exposure (no
pun) at all.
cheers
keep printing, scan if you want to!
Risa
http://www.pgsm.com/babbleon/