[pure-silver] Re: Paraformaldehyde/Acetone in lith developers
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 1 Mar 2010 20:22:00 -0800
----- Original Message -----
From: "BILL WILLIAMS" <krbill_10@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, March 01, 2010 7:44 PM
Subject: [pure-silver] Re: Paraformaldehyde/Acetone in lith
developers
Kodak Super RT has Sodium Formaldehyde Bisulfite, according
to the MSDS. The dry form of sodium formaldehyde bisulfite
can be found as the (I believe) only ingredient in ClorAmX
which is use to remove clorine and ammonia from aquarium
water. The wet form is Amquel, used for the same purpose. I
use the Amquel, as I don't do a lot of lith printing, and
liquid is handier for me. I believe that 20 ml of Amquel is
equivalent to 5 grams of the dry sodium formaldehyde
bisulfite.
I find the odor of the 'SFB' is not irritating as is that of
acetone. That is, I can always smell the acetone, but not
the sodium formaldehyde bisulfite. I also have on hand
formalin, which I sometimes use. It too has an ordor, but
again, it is not as irritating to me as is acetone. And,
acetone is flammable. You can order quite a bit of the
sodium formaldehyde bisulfite in bulk for 50 or so dollars.
It is always amazing to me the stuff you can get at
swimming pool shops, aquarium shops, and the grocery store.
Groceries used to carry Red Devil Lye, perfectly pure sodium
hydroxide, and also 20 Mule-Team Borax, also pure enough for
photographic uses. Both are useful in themselves but can be
combined in solution to form "Kodalk" AKA sodium metaborate,
pentahydrate (although Kodak called it octahydrate).
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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