[pure-silver] Re: Citric Acid as stop bath
- From: Gerald Koch <gerald.koch@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 13 Oct 2010 11:06:01 -0700 (PDT)
This is a problem with citric acid and is the reason that many people use it as
a one shot. You can add a snall crystal of thymol to the solution. See if
there is a compounding pharmacy in your area which might be able to sell you a
small amount. Your stop bath will smell like Listerine. If you can't obtain
thymol then add a drop or two of phenol. You can also try adding a gram of
sodium or potassium bisulfite which is used to sterilize wine bottles.
You could switch to a boric acid stop bath which also has no smell. Use 30 g/l
as a working solution. Use crystalline boric acid rather than the powder.
Jerry
________________________________
From: Robert Hall <robert.g.hall@xxxxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Wed, October 13, 2010 1:35:39 PM
Subject: [pure-silver] Citric Acid as stop bath
I have used citric acid for some time as a stop bath. I find that after several
days it develops some kind of fungus or scum. What can I add to the stop bath
to
keep this from happening.
Thanks,
Robert Hall
www.RobertHall.com
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