RE: Making Silver Oxide From Red Devil Lye: Argyrotype

Very good!!!

-----Original Message-----
From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: Tuesday, 6 September 2005 2:54 p.m.
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Making Silver Oxide From Red Devil Lye: Argyrotype

"Of course why stop at Silver Oxide why not just start compounding my
own Silver Nitrate," or so I thought....until I read this....don't try
this at home kids... you'll almost die laughing.

http://lerch.no-ip.com/atm/DEAD.htm

R.I.P.

~m

Etienne Garbaux wrote:
> Michael wrote:
>
>> the lye I have on hand is guaranteed 98.5 per cent pure sodium
>> hydroxide, marketed as an ingredient for making soap.
>
>> I'm thinking that this must be pure
>> enough for this intended use.
>
> Of course, it all depends on what the < 1.5% impurities are and what
> process you are doing! But yes, grocery-store lye is generally
> perfectly fine for all photographic uses (as are grocery-store washing

> soda [sodium carbonate], baking soda [sodium bicarbonate], sour salt
> [citric acid], and borax).
>
> My previous message was directed specifically at Drano brand drain
> cleaner, which (in the US) is about 90% sodium hydroxide plus about
> 10% aluminum shavings plus coloring and anti-caking ingredients. It's
> primarily the aluminum that makes Drano unsuitable for photographic
> uses. When you put it in water, the NaOH reacts with the aluminum,
> giving off hydrogen gas and leaving aluminum ions in the solution.
> The aluminum ions then react with other ions in your coating and/or
> processing chemistry (particularly those containing other metal ions),

> leading to undesired results.
>
> Best regards,
>
> etienne

-- 
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.10.18/89 - Release Date:
2/09/2005
 
-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.10.18/89 - Release Date:
2/09/2005