From: Christina Z. Anderson (zphoto@montana.net)
Date: 09/09/02-03:01:51 PM Z
Thanks, Jack. I asked the question because it seems quite a few of the old
formulae I am looking at from the early part of this century call for nitric
acid, so my question probably is moreso is glacial acetic a strong enough
acid to substitute...in other words, would glacial acetic be like using a
hammer and nitric like using a nuclear bomb, you know? As in, totally
unnecessary today?
I know a lot of the old books have mercury formulae also, so I am
assuming they were not as aware of the dangers of chems at that time.
chris
----- Original Message -----
From: "Jack Fulton" <jefulton1@attbi.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, September 08, 2002 9:37 PM
Subject: Re: acids
> Holy Cow . . nitric acid is a lot tougher, rougher and meaner than acetic
> acid AND also sulfuric acid. It is nothing to mess with at all.
> AND, if you mix hydrochloric and nitric acids you will achieve 'aqua
regia',
> or, royal water. this will dissolve gold and platinum.
> On the order of being dangerous it is:
> 1. acetic acid normal
> 2. glacial acetic (a concentration)
> 3. hydrochloric acid
> 4. sulfuric acid
> 5. nitric acid
> 6. aqua regia
>
> Either 28% acetic acid or glacial acetic acid are our mainstays in
> photography. In a pinch, a clear vinegar could be used as a stop also
> Hydrochloric acid in a dilute form used to clean fireplace soot dirty
> ceramic tile and concrete driveways is called muriatic acid.
> Sulfuric acid is used in car batteries and will etch away your clothing
in
> a short amount of time.
> Nitric acid is laboratory stuff.
> Aqua regia is for professional people who know what they are doing .. .
> only.
>
> Jack
>
> > From: "Christina Z. Anderson" <zphoto@montana.net>
> > Reply-To: alt-photo-process-l@sask.usask.ca
> > Date: Sun, 08 Sep 2002 11:07:39 -0600
> > To: Alt Photo List <alt-photo-process-l@sask.usask.ca>
> > Subject: acids
> >
> > I'm still working on this mordancage thing. Question: what is the
> > difference between acetic acid and nitric acid? I mean, in activity, as
I
> > know the compounds are different. It seems probable that the acetic is
more
> > innocuous perhaps? Is nitric in any way dangerous to use, e.g. fumes
etc.?
> > Any comments would be welcome to a non-chemist such as myself. (I did
the
> > mistake of doing early admissions into college, missing my senior year
in
> > highschool, and avoided the high school chem class and college as well.
What
> > a mistake.)
> > Chris
> >
>
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