Re: to Eric about.. Silver Nitrate in Albumen Printing... Concentration Question

yes i have. i've never tried brush sensitization.
reilly mentions concentrations ranging from 10-12% for
albumen, so your mileage may vary as well.

your gold toner concentrations can negatively affect
the print as well. too much can give a blotchy green
effect. getting the right pH is important as well.
Eric

--- "Adam. Waterson" <artistboi@speakeasy.net> wrote:
> Thanks Eric.. yeah, I am not using a bath for
> sensitizing, because of
> the size of my prints I am using a Haki Brush and
> applying selectively
> to the paper by hand.
>
> So u've had luck with a 12% sol'n?
>
> On Feb 8, 2004, at 4:59 PM, Eric Nelson wrote:
>
> > I always followed Reilly's rule of thumb below
> > following sensitization of a number of prints.
> >
> > "Replenish the lost volume with a silver nitrate
> > solution twice as strong as the original bath. For
> > example, if the original strength and volume were
> 1
> > liter of 12% silver solution and after a printing
> > session only 850 ml remained, replenish with 150
> ml of
> > 24% silver solution. This should restore the
> silver
> > bath to the original strength and volume. If
> citric
> > acid is used in the sensitizing solution, it is
> > replenished strictly on the basis of volume lost
> from
> > the solution. For example, if the liter of
> sensitizing
> > solution had originally contained 5% citric acid
> > (i.e., 50 g) and 850 ml was left after a printing
> > session, then the missing 15% of the original
> volume
> > of 1 liter represents a loss of 15% (i.e., 7.5 g)
> of
> > citric acid. Thus the 150 ml of replenisher would
> > contain 7.5 g citric acid in addition to the
> required
> > amount of silver nitrate."
> >
> > Also because of the organic albumen & salt getting
> > into the silvering solution, the solution will
> start
> > to turn dark and start causing problems in
> > sensitization and the resulting prints. By adding
> > kaolin powder (active ingredient in Keopectate® =D
> )
> > and shaking the solution, and allowing the kaolin
> to
> > settle overnight, the organic contaminants are
> > removed.
> >
> > You can find all the specifics here
> >
>
http://albumen.stanford.edu/library/monographs/reilly/index.html
> > Eric
> > http://www.eman-photo.com/
> >
> >
> > --- "Adam. Waterson" <artistboi@speakeasy.net>
> wrote:
> >> Ey y'all
> >>
> >> I'm working with Albumen printing and am coming
> >> across a bit of a
> >> difficulty with my sensitizing material. I was
> >> wondering if any of you
> >> had a good "recipe" for the amount of Silver
> Nitrate
> >> to Water. I know
> >> there is a threshold at which too much Silver
> >> Nitrate makes the print
> >> weaker, not stronger. Was just wondering anyone
> had
> >> a really good
> >> concentration worked out, I know it has to
> >> correspond to the pH of the
> >> Albumen you're using, but I was just hoping for a
> >> point to start
> >> experimenting more heavily off of.
> >>
> >>
> >> ALSO... Where do people get Silver Nitrate from?
> It
> >> is out of stock at
> >> TriEss, and I don't buy from photographers
> >> formulary, it is far too
> >> expensive through them. So anyone know other
> >> chemical dealerships?
> >> Thanks!
> >> Adam.
> >>
> >
> >
> > __________________________________
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> >
>

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Received on Sun Feb 8 16:38:40 2004