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mixed up glaze, calculation help needed

updated thu 24 aug 06

 

Sam Tomich on sun 20 aug 06


I could use some help.. I mixed up a ^6 ox. glaze that was on my spreadshee=
t
and read the ingredients way wrong. This is what I read (and mixed):

Ferro Frit 3195 20
Wollastonite 29
Neph Sy 4
Silica 30
G-200 Feldspar 17
-------------------------------
Red Iron Oxide 7.1
Rutile 6

I made a 5K batch of this so I wanted to see If I could save it, since it=B9s
a lot of chemical to give up for lost (even though it=B9s less than a $7
investment). But I don=B9t have a glaze chem program and no knowledge of
their use as of yet. I=B9ll go searching for a demo. While I try to do this,
most likely unsuccessfully, will someone who has experience with analyzing
glazes, please look up something that we can add that will make this glaze
work. I assume it will be entirely to
runny, and dive off the pot.

Steve Slatin on mon 21 aug 06


Sam --

It's not as bad as it might be -- you're in the 20% range for
total fluxes, plus just over 4% Boron (B2O3). What could make
this a really runny glaze is that the Alumina level is low --
just 4.3%. The Si:Al ratio is 16.53; that's way, way high.

I'd suggest adding a clay to bring up the alumina level (and
also keep the glaze from settling out too badly, which it
may otherwise). If you add 15% EPK you'd get total fluxes
of 18.57, Si:Al of 10.10, and Boron of 3.8 -- possible in the
good range of glossy glazes.

There are advantages to using a ball clay, but most of the
ball clay's I've used have less alumina than EPK. If I were to use
OM-4, for example, 15% would leave you at 11.6 Si:Al,and 18.6
% total fluxes -- still probably a bit runny. If you go with 15% of OM-4
though, and also add 10% EPK, you land on 17.53% fluxes, under 2%
sodium, 3.55% boron, and Si:Al of 9.22. That's in the range where
I'd be tempted to test it.

Best wishes -- whatever you do, please let us know what the outcome
is.

-- Steve Slatin




Sam Tomich wrote:
I could use some help.. I mixed up a ^6 ox. glaze that was on my spreadsheet
and read the ingredients way wrong. This is what I read (and mixed):

Ferro Frit 3195 20
Wollastonite 29
Neph Sy 4
Silica 30
G-200 Feldspar 17
-------------------------------
Red Iron Oxide 7.1
Rutile 6

I made a 5K batch of this so I wanted to see If I could save it, since itıs
a lot of chemical to give up for lost (even though itıs less than a $7
investment). But I donıt have a glaze chem program and no knowledge of
their use as of yet. Iıll go searching for a demo. While I try to do this,
most likely unsuccessfully, will someone who has experience with analyzing
glazes, please look up something that we can add that will make this glaze
work. I assume it will be entirely to
runny, and dive off the pot.

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Ron Roy on mon 21 aug 06


Hi Sam,

What was it supposed to be? I might be able to work up a fix.

RR

>I could use some help.. I mixed up a ^6 ox. glaze that was on my spreadsheet
>and read the ingredients way wrong. This is what I read (and mixed):
>
>Ferro Frit 3195 20
>Wollastonite 29
>Neph Sy 4
>Silica 30
>G-200 Feldspar 17
>-------------------------------
>Red Iron Oxide 7.1
>Rutile 6
>
>I made a 5K batch of this so I wanted to see If I could save it, since it's
>a lot of chemical to give up for lost (even though it's less than a $7
>investment). But I don't have a glaze chem program and no knowledge of
>their use as of yet. I'll go searching for a demo. While I try to do this,
>most likely unsuccessfully, will someone who has experience with analyzing
>glazes, please look up something that we can add that will make this glaze
>work. I assume it will be entirely to
> runny, and dive off the pot.

Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0

Sam Tomich on mon 21 aug 06


You mean you can't recognize it? ;) It's Oatmeal with a different colorant
and some screwed up ingredients! Love it if you could help, Sammy

On 08/21/2006 10:16 AM, "Ron Roy" wrote:

> Hi Sam,
>
> What was it supposed to be? I might be able to work up a fix.
>
> RR
>
>> I could use some help.. I mixed up a ^6 ox. glaze that was on my spreadsheet
>> and read the ingredients way wrong. This is what I read (and mixed):
>>
>> Ferro Frit 3195 20
>> Wollastonite 29
>> Neph Sy 4
>> Silica 30
>> G-200 Feldspar 17
>> -------------------------------
>> Red Iron Oxide 7.1
>> Rutile 6
>>
>> I made a 5K batch of this so I wanted to see If I could save it, since it's
>> a lot of chemical to give up for lost (even though it's less than a $7
>> investment). But I don't have a glaze chem program and no knowledge of
>> their use as of yet. I'll go searching for a demo. While I try to do this,
>> most likely unsuccessfully, will someone who has experience with analyzing
>> glazes, please look up something that we can add that will make this glaze
>> work. I assume it will be entirely to
>> runny, and dive off the pot.
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>
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Lee Love on tue 22 aug 06


On 8/22/06, Sam Tomich wrote:

> You mean you can't recognize it? ;) It's Oatmeal with a different colorant
> and some screwed up ingredients! Love it if you could help, Sammy

What is the original recipe? Which of the hundreds of oatmeal recipes?



--

Lee in Mashiko, Japan
http://potters.blogspot.com/
"Let the beauty we love be what we do." - Rumi