Re: Gum a la Sam Wang

Gary, and Charles, below,

Cutting my am di down to 20% of what I normally use did not require a long
exposure as I presumed. Even with the thinner digital negative, I thought
cutting down the dichromate that drastically would warrant maybe a 6 minute
exposure, for instance. With regular negatives enlarged in the darkroom I
usually exposed layers from 1-6 minutes with the *30%* am di--usually closer
to the higher number. With digital negatives this 6% solution requires a
1-4 minute exposure. Hope this is clear. The lower density and contrast of
the digital negatives "fits" Sam's 6% solution dilution for good contrast,
using his curve.

To answer Charles' question: I have not gone back and printed my normally
enlarged negs (yet) with the weaker solution, but that is definitely
something I will do when I get some free time (ha). I bet Sandy or Sam or
some other gum printer would have an immediate answer on this for
you--because the question is essentially how much loss of speed is there
with dilution of dichromate. Right now I need to stick to the digital neg
thing or else I won't have a final project finished :)
Chris

>>Pardon me, but I'm getting confused here. Are you saying that
when you used the diluted am di the same/similar old exposure
worked? Regards,
Gary Nored

<Charles Ryberg said>Do I understand you to say that your first mix--with
more
dichromate--worked well with enlarged negatives but not with digital ones
and that the weaker mix worked well with digital negatives? If so, I wonder
if you have tried the weaker mix with enlarged negatives?
Received on Sat Nov 22 22:51:56 2003