Dave Finkelnburg on thu 11 may 00
Ian,
I'm not sure what's up with Laguna, but for what it's worth, I received
this note from Jon Pacini at Laguna when I requested the same sort of
information you asked for. He has included a unity formula which he said
is for Laguna Borate. The first version I got from Jon was incorrect. I
trust this is correct and hope it helps.
Dave Finkelnburg
-----Original Message-----
From: Jon Pacini
To: Dave Finkelnburg
Date: Thursday, April 20, 2000 10:52 AM
Subject: Re: Gerstley Borate Sub.
>Hi Dave----Boy am I glad you caught that---a slight glich in the old
>computer program.
>here's the correct formulation:
>Na2O-.136,K2O-.032,CaO-.713,
>MgO-.119,Al2O3-.168,SiO2-.662
>B2O3-.839,TiO2-.002,Fe2O3-.001
>There that should work better---Thanks
>Jon Pacini
>Laguna Clay Co.
-----Original Message-----
From: Ian Macmillan
To: CLAYART@LSV.UKY.EDU
Date: Wednesday, May 10, 2000 9:07 PM
Subject: Laguna Borate
----------------------------Original message----------------------------
I have received a sample pack of Laguna Borate, and have every intention of
trying it in some glazes.
I was rather perturbed, however, when I phoned Laguna Clay to get an oxide
analysis to use in my glaze calculation program, and was told that they
would not supply this information. I was told to use the formula for
gerstley as it would be good enough. It strikes me that a serious glaze
maker would want the precise analysis, and that if they are not willing to
supply it, they are not interested in serious usage of this material. It
would also be nice to know the form of borate in terms of solubility, but
the material came with no documentation whatever.
Ian
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