[pure-silver] Re: Ansco 120 shelf life?
- From: "J.R. Stewart" <jrstewart@xxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 2 Nov 2005 22:18:44 -0500
I use A120 as a standard developer, Philippe.
It's pretty stable. In the tray covered with Saran (or similar) wrap allowed
to sit right on the surface of the liquid, it will literally last a few
weeks depending on frequency of use. It turns brown when it oxidizes, so you
know when to throw it out.
I routinely keep my chemicals in clean wine bottles stoppered with the
vacuum pump type apparatus (get it at a kitchen or wine shop). You extract
all the air from the headspace so the developer is under vacuum. Under these
conditions, A120 or any other developer I've used lasts literally several
months to more than a year. No kidding. I see minor sedimenting but it's not
catastrophic. I think I paid $20USD for the pump and about 12 stoppers.
The only thing you have to watch with A120 is that it doesn't seem to have
the same capacity as Ansco 130. So it may or may not last through a complete
print session. But it's pretty obvious when exhaustion overtakes the
developer, isn't it?
Regards,
JR Stewart
Leesburg, VA
----- Original Message -----
From: "Philippe Gauthier" <pgauth@xxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, November 01, 2005 5:35 PM
Subject: [pure-silver] Ansco 120 shelf life?
Hello
I'll be mixing some Ansco 120 tonight as part as a paper developer
workshop in my photo club. Now, I know that, thanks to glycin, Ansco 130
will keep for several months, but how long will Ansco 120 keep? I don't
see any indications anywhere. Do you have to mix it fresh everytime you
want to use it?
Philippe Gauthier
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