Re: Ferric Oxalate Questions

Re: Ferric Oxalate QuestionsNo other additives. It appears from the MSDS that it's straight up H2O2 35% (the remaining 65% is H2O). You may be able to buy it at garden centres too if walking into the local hydroponics shop and talking to a guy named Dirtbeard ain't your thang...
http://www.grotek.net/products/guide/product.asp?code=superoxyh2

~m
  ----- Original Message -----
  From: G Guhan Gunaratnam
  To: alt-photo-process-l@usask.ca
  Sent: Monday, July 17, 2006 3:06 PM
  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>
       
      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 07/17/06-03:10:26 PM Z