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

[Loris Medici]

First of all thanks for the used fixer and steel wool info, that was
something I didn't know...

Darryl, I use a 600ml beaker for the job, I prepare around 100ml of silver
nitrate and 100ml sodium hydroxide (both solutions with matching amounts of
each compound) and pour one into the other, I didn't notice any extra /
significant volume increase during the reaction. I then stir well, let the
dry settle, decant 3-4 more times with distilled water and put the sludge
into the sulfamic acid solution (using a plastic spoon) later. Pretty easy
stuff, you just need four extra steps: 1. silver nitrate solution, 2.
sodium hydroxide solution and 3. combining the two and 4. decanting /
washing few times.

Regards,
Loris.


2013/5/10 Darryl Baird <darryl at darrylbaird.com>
>
> ...
> 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.".
> ...