From: Joe Portale (jportale@gci-net.com)
Date: 12/24/00-04:13:06 PM Z
Sandy,
Fix the kallitype in 5o grams of plain hypo to 1000 mls of water. My
customary time is five minutes at 70 degrees F. Watch for bleaching in the
fixer. Certain papers, like a light weight masa or a harder parchment tend
to allow for faster bleaching than say a good heavy rag or cotten, ie.
Cranes, Fariano or Arches.
I think that fixing for anything less than three minutes is flirting with
disaster.
Merry Christmas and Happy Holidays!
Joe!
----- Original Message -----
From: Sandy King <sanking@hubcap.clemson.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, December 23, 2000 6:58 AM
Subject: Fixing kallitypes, was Re: Ferric Oxalate Solution?
> Joe,
>
> I made the test and my solution appears to be fine. The color that
> resulted was a very decided green, no blue at all.
>
> BTW, what is the current thought on the best way to fix kallitypes?
> The literature is all over the board re: both strength of the fixer
> (2-5%) and length of fixing (15 seconds to 5 minutes)?
>
> Sandy King
>
>
>
>
>
> >Yes, there is a simple test. You need a 5% solution of potassium
> >ferricyanide (sp?). Take a piece of filter paper or a white coffee
filter
> >and place a couple of drops of your ferric solution on it. Wait a couple
of
> >seconds for the solution to soak in. Then add a drop or two of the
cyanide
> >solution. If your oxalate is good, you will have no or only very pale
blue
> >coloring. If the more ferric present, the darker the blue. If you are
> >getting anything more than a pale blue, you are in trouble. You may be
able
> >to salvage you ferric oxalate solution by adding, drop by drop, small
> >amounts of hydrogen peroxide. There will be some fizzing and heat
> >generated, so go slow. Add the peroxide until there is little or no
fizzing
> >and retest. Hope this helped.
> >
> >One more thing. Even with heating it will take a bit of time to get all
the
> >oxalate into solution. If by tomorrow morning you still have some
sediment,
> >give the bottle a good shake every couple of hours. It will eventually
all
> >go into solution. I believe the saturation point of ferric oxalate in
around
> >55 to 60%.
> >
> >Joe
> >
> >
> >
> >
> >----- Original Message -----
> >From: Sandy King <sanking@hubcap.clemson.edu>
> >To: <alt-photo-process-l@sask.usask.ca>
> >Sent: Wednesday, December 27, 2000 8:59 PM
> >Subject: Re: Ferric Oxalate Solution?
> >
> >
> >>
> >> Joe,
> >>
> >> I heated the solution, but violently in the microwave, maybe up to
> >> 170F in about a minute. Any way to know if this turned the ferric to
> >> ferrous? Most of the oxalate, but not all, went into solution after
> >> the above plus some agitation.
> >>
> >> Sandy
> >>
>
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