[Alt-photo] Re: Was Sulfamic now VDB and pt/pd gold leaf

[Darryl Baird]

That's an interesting technique for silver oxide... must try it
since there is a lot of used fix around, but I'd bet to use it in
Argyrotype might introduce other issues into printing unless it can be
truly high grade precipitant. 

I've certainly made silver oxide using
sodium hydroxide. A note to those considering this route: use a final
container several times larger than the required silver nitrate + sodium
hydroxide chemistry since the combination is pretty volatile... its
volume expands quickly before the precipitant forms and the solution
"settles down.". 

Anecdote: We once experimented substituting sodium
hydroxide with Draino, which lists sodium hydroxide as "100%" of its
contents, and got an argyrotype which was neutral (gray) in color as
opposed to the warm brown. I'm guessing there was something else in the
can... :) 

~Darryl 

On 2013-05-10 08:49, andy schmitt wrote: 

> I
certainly wish u would...
> It was an old & cheap way to detox used
fixer, stirring steel wool into it.
> The Silver is replaced with iron &
you get AgO as a precipitate...
> A really nice stable, hard to break up
compound...
> Have a great weekend...
> 
> -----Original Message-----
>
From: alt-photo-process-list-bounces at lists.altphotolist.org
>
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
Of
> Loris Medici
> Sent: Friday, May 10, 2013 10:34 AM
> To: The
alternative photographic processes mailing list
> Subject: [Alt-photo]
Re: Was Sulfamic now VDB and pt/pd gold leaf
> 
> Hi Andy, I'm not
familiar with the procedure you describe, but my gut
> feeling is that
you'll get elementary silver that way.
> 
> Regards,
> Loris.
> 
>
2013/5/10 andy schmitt <aschmitt at aandy.org>
> 
>> Hi Loris Isn't silver
oxide the result of "detox'ing" used fixer by dropping steel wool in it?
Fascinating conversation... I'm going to have to try Agyrotypes Thank
You Regards Andy Schmitt Head of The New & Improved Photography Dept,
Peters Valley School of Craft
http://www.petersvalley.org/html/Photography.cfm [1] -----Original
Message----- From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On
Behalf
> 
> Of
> 
>> Loris Medici Sent: Friday, May 10, 2013 3:01 AM To:
The alternative photographic processes mailing list Subject: [Alt-photo]
Re: Was Sulfamic now VDB and pt/pd gold leaf Hi Don, I agree about kits
(if you don't want to mess with chemistry),
> 
> OTOH,
> if one's going
to get their hands dirty, compounding silver oxide from silver nitrate +
sodium hydroxide isn't that hard or fail-prone (just 
> 
> weight




Links:
------
[1] http://www.petersvalley.org/html/Photography.cfm