Re: RE: sodium metaborate

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From: Normunds Saumanis (normunds.saumanis@lv.ibm.com)
Date: 08/26/03-04:05:09 AM Z


Some information from that discussion can be found in my photo chemistry
site. Here is a direct link to Sodium Metaborate entry:
http://www.pofig.net/photodb/viewChemicals.do?action=Details&id=19

Normunds

Richard Knoppow <dickburk@ix.netcom.com>
2003.08.26 11:05
Please respond to alt-photo-process-l
 
        To: alt-photo-process-l@skyway.usask.ca
        cc:
        Subject: Re: RE: sodium metaborate

 

-------Original Message-------
From: "Breukel, C. (HKG)" <C.Breukel@lumc.nl>
Sent: 08/26/03 12:04 AM
To: "'alt-photo-process-l@sask.usask.ca'"
<alt-photo-process-l@sask.usask.ca>
Subject: RE: sodium metaborate

>
> Louis,

The SMB I use has 4 water molecules so tetrahydrate. Btw I have never been
able to get the amount Gordon suggest into solution (or better: keep it in
solution). So I mix it half strength and use double amounts when mixing
the
developer

Hope this helps,

Cor

> -----Original Message-----
> From: Louis de Stoutz [mailto:loudest@attglobal.net]
> Sent: Monday, August 25, 2003 11:18 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: sodium metaborate
>
>
> Hi Folks,
>
> Sorry if this has been discussed before.
> Does anybody know if the quantities for PMK in Gordon Hutchings' book
> refer to Sodium Metaborate _tetrahydrate_ or _anhydrous_ (or any other
> form) ?
>
> Thanks,
> Louis
>
  There was a very long thread in the Pure-Silver mailing list fairly
recently about what exactly Kodalk is. I don't remember all the details
but it seems that the hydration is somewhat uncertain. I can't find the
archive for Pure-Silver but will post it later (when I am at home).
Included in the discussion is how to make Metaborate from borax and sodium
hydroxide.
 

Richard Knoppow
dickburk@ix.netcom.com
Los Angeles, CA, USA


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