Re: VDB
Title: Re: VDB
You are smart to work in a humidified environment. The difference
in potential Dmax in VDB between working at RH of 35% and RH of 55% is
significant, with much advantage to the higher RH. At 35% RH and
single coating I am lucky to get a Dmax of 1.30, whereas at 55% Damx
is usually 1.45 or higher.
In the winter I run a humidifier in the workroom whenever I plan
to print with VDB, kallitype or pt./pd. It is the type that turns off
and on to adjust to a certain RH, and I keep it set for 55% RH. Don't
just turn it on and start printing when the room RH reaches 55%. You
need also to make sure that the paper has had enough time to absorb
moisture from the air to reach equilibrium at the same RH.
Sandy King
At 3:02 PM -0500 11/9/07, Jordan Wosnick wrote:
On Nov 5, 2007 1:06 PM, Sandy King <sanking@clemson.edu>
wrote:
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.
This is encouraging, because I find that many of the problems I have
with VDB are the result of the double-coating process (e.g. the first
coat goes on fine, but the second one gives me problems with
blotchiness). I routinely print my VDBs in a humidified environment
and tone them with palladium before fixing anyway, so maybe I can
dispense with the second coat and get more consistent results...
Jordan
--
Jordan Wosnick
jwosnick@gmail.com
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