Re: RE: sodium metaborate

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From: Sandy King (sanking@clemson.edu)
Date: 08/26/03-10:28:08 PM Z

For 1000ml of a 30% sodium metaborate solution, same as one would
need for Stock B solution of PMK and Rollo Pyro, mix 136g of Mule
Team Borax in distilled water with 29g Red Devil Lye, to make a total
of 1000ml of solution.

I have tested the above solution against a 30% solution of Kodalk in
both PMK and Rollo Pyro formulas and results were virtually identical.

Sandy

>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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