RE: Ferric Oxalate Questions

Gu, I am back from vacation. I use(d) the 3% for adjusting contrast with
additional dilutions down to .5 % within the coating solution and 35% when
making Ferric Oxalate from Ferrous Ammonium Sulfate. Beauty Parlors would be
a hair salon, etc. They use it to bleach hair, for colorizing, etc.

 Eric

Eric Neilsen Photography

4101 Commerce Street, Suite 9

Dallas, TX 75226

214-827-8301

http://ericneilsenphotography.com

Skype : ejprinter

  _____

From: G Guhan Gunaratnam [mailto:guruguhan@hotmail.com]
Sent: Monday, July 17, 2006 3:07 PM
To: alt-photo-process-l@usask.ca
Subject: Re: Ferric Oxalate Questions

Thanks a lot for all the help everyone

Michael...are there any other additives in the Grotek Super Oxy?

Has anyone been able to determine the concentration of those other grades
you can buy at a beauty parlour?

Bill, my primary reason for the higher concentration of H202 isn't for
sensitizer (though I was curious as to which concentration of H202 one does
add to sensitizer - 3% thx). I'm getting the higher conc stuff to convert
the Ferrous I have to Ferric. I've figured out that 6% is the best for what
I'm planning, so I might try increasing the concentration of the 3% I have.
Or go to the beauty parlor.

K, I don't want everyone to assume I'm a fetid, troll-like being...but what
exactly is a beauty parlor? There is a hair salon across the street, and a
spa - do these pass as beauty parlors?

Can anyone chime in on q's 2,3 and 4? (For example, if a 13.5% solution was
used instead of 27% - same drop count - what would the result be)?

Regards,
Gu

On 7/16/06 11:07 PM, "Michael Koch-Schulte" <mkochsch@shaw.ca> wrote:

Gu, if you want to try a higher concentration of Hydrogen Peroxide go the
the local "grow op" store. You should be able to pick up a litre of "Grotek
Super Oxy" for about $9 CDN. 35% concentration H2O2. Just be very careful
with it. Spills will ignite things.

~m

----- Original Message -----
 
From: G Guhan Gunaratnam <mailto:guruguhan@hotmail.com>
<mailto:guruguhan@hotmail.com>
 
To: alt-photo-process-l@usask.ca
 
Sent: Sunday, July 16, 2006 12:32 PM
 
Subject: Ferric Oxalate Questions
 

Hello,

I was hoping someone could help with some questions I have regarding FO. I
have ended up with a large amount of Ferrous Oxalate, I have placed an
order for Ferric, but have been playing around with what I have in the
meantime. I have made some ferric from oxalic acid, ferrous oxalate, and
hydrogen peroxide. I didn't have strong H202 to work with, and had to use
it in a 3% concentration. The solution now passes the Potassium
Ferricyanide test, but I'm unsure of the concentration and a few other
things.

1. If you have an FO solution just sitting in front of you, is there a
way to determine its concentration?
2. Is 27% solution used because it simplifies the mixing process (1:1
with metal salts)?
3. would a weaker FO solution cause any significant problems apart
from complicating the ratio with metal salts?
4. if the ratio of metal salts to ferric is not correct (too little
ferric), what would the result be? - lower density due to the salts being
washed away? - what is the price of using too much ferric (harder to
clear)?
5. For those of you who add a drop or so of H202 to your
sensitizer...what concentration do you use?

To properly get the concentration of the FO I've got, I'll redo my steps.
First time I just wanted to see if I could get the Ferric with such a weak
solution of peroxide.

Thanks in advance,
Gu

 
Received on 07/17/06-02:20:13 PM Z