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Posted by DKat on September 14, 2006, 10:05 am
Please log in for more thread options P.S. when I said 'my' recipe - I meant the one I use and not the one I
tweaked.
I see very little difference in the 2 glazes with the Unity formula - don't
know why it was ever changed.
Randys Tobys
Na2O .122 .125
K2O .034 .034
MgO .355 .343
CaO .478 .497
Alkalies .156 .159
Fluxes 1 1
Al2O3 .255 .261
B2O3 .363 .389
Fe2O3 .303 .307
SiO2 3.19 3.197
TiO2 .001 .001
Si:Al 12.506/1 12.267/1
> Your R10 is Red Iron Oxide. I use Special Red Iron Oxide. Spanish Oxide
> gives a more brown color. I also mix my glaze up and let it age.
>
> My recipe for Randy's Red
> Gerstley Borate--1999 3200 (~32%)
> Flint 3000 (~30%)
> Feldspar--Kona F4 2000 (~20%)
> Talc 1400 (~14%)
> Kaolin--EPK 500 (~5%)
> Iron Oxide--Red 1515 (15%)
>
> As you can see it has been tweaked a bit. The total is 10100 grams (with
> 15% Special Red Iron Oxide = 11615 grams) which makes up about a 5gallon
> bucket of glaze. It is critical that this glaze be cooled slowly at
> around 1400F (125C). Some people will fire the piece again with
> bisqueware if they don't get the color they want.
>
> http://www.masteringglazes.com/Pages/faqframe.html
>
>> Hi All,
>> I have a recipe for a glaze that calls for R 10. I made the glaze and
>> love it on a certain clay and I showed the piece to a friend. He
>> wanted the recipe so I gave it to him and he asked me what is R 10 and
>> I don't know. Here is the recipe:
>> Randy's Red Cone 5-6
>>
>> Flint 30%
>> EPK 5%
>> G 200 20%
>> Talc 15%
>> Gertsley Borate 30%
>> R 10 15%
>>
>> The R 10 looks a lot like red iron oxide. I bought it at my local clay
>> supply store. Does anyone know if red iron ox. could be substuted for
>> R 10? Does anyone know what R 10 is?
>>
>> Thank you for any info on this.
>> Sandi
>>
>
>
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