Re: VDB
Title: Re: VDB
Mark,
As Don mentioned, there are many ways to work VDB with good
results.
As to why double coating works better, one line of thought is
that it just puts more moisture in the paper. For example, if you just
coat the paper with plain distilled water, let dry, and then apply a
coat of sensitizer, you will often see an increase in Dmax. All of
this depends on how long you let the paper dry, drying conditions,
etc.
However, like Loris I have found that I get as much or more Dmax
by single coating and then toning before fixing. Yes, toning changes
the color of native VDB, but then again a toned VDB should be theory
be much more archival than an untoned one.
BTW, I used to always double coat, but I found that with
palladium and kallitype it was much more difficult to remove the
stain than with single coating. I don't have any trouble with stain
with VDB so in theory could double coat all the time, just don't find
it necessary.
Sandy King
At 12:53 PM -0500 11/5/07, Ender100@aol.com wrote:
Don,
Is the double coating sometimes working better because the first
coat acidifies the paper (with some papers)?
Mark
In a message dated 11/5/07 10:54:21 AM, dsbryant@bellsouth.net
writes:
I don't disagree with Loris or Sandy about toning
though I think it should
be noted that toning VDB causes a change in the color of the final
print. As
for doubled coating, I prefer double coated prints, toned or untoned
and
would suggest that one should perform their own tests to see what
works for
them. There are a lot of ways to print VDB and it takes some time to
sort
them all out to discover what the variations look like.
I should also mention that additives to the sensitizer can be used
to
influenced the final color of the print, toned or untoned.
I think Ware's Agyrotype process is worth exploring too, I keep
telling
myself to do that but keep getting side tracked on to other
things.
Don Bryant
Best Wishes,
Mark Nelson
Precision Digital Negatives -
The System
PDNPrint Forum at Yahoo
Groups
www.MarkINelsonPhoto.com
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