louroess2210 on sun 2 apr 06
On Apr 1, 2006, at 12:20 PM, Ron Roy wrote:
> The Teal blue - using frit 3124 will not melt well at cone 6 for
> starters -
> should that be frit 3134?
Ron, I forgot to ask, is there a flux I can add to the glaze made
with 3124 to get it into the cone 6 range?
If so what and how much?
I am planning on taking the plunge and ordering glaze calc software
after we get back from vacation next month.
Maybe I can answer a lot of my own questions from now on.
Thanks for your help.
Lou
Ron Roy on tue 4 apr 06
Hi Lou,
I tried it with three different frits and GB - I can get the fluxes and
boron right but there is always to much alumina and silica - so if you
could take out some EPK and silica it would work.
Add frit 3134 9.0
Take out 4.5 EPK and 1.0 silica.
New total would be 103.5
Yes - I know - no way to take anything out!
The way you can use this information is to mix up a new batch (same amount
as the original or whats left - adding the extra frit and reducing the epk
and silica - - by the right amount.
Wait - I think I got it using some whiting and frit 3278 - better try it
using a quarter of your original batch - then divide this by 4
Here is the new recipe with the additions.
Custer - 20.0
3124 - 20.0
3278 - 12.0 Wollas - 20.0
EPK - 20.0
Silica - 22.5 Whiting - 4.0 Total - 118.5
Those of you who have calculators will see - the new glaze has a little
less CaO - expansion is up a small amount and the ratio is the same. If I
added more whiting and topped up the boron, alumina and silica I could get
it exactly the same.
You add 12.0 3278, another 2.5 silica and 4 whiting -
So to 1/4 of your original add - 3.0 frit 3278, 0.63 silica and 1 whiting
for every 100 grams of the original dry weight - in this case based on 1/4
of what you mixed.
The total of the new recipe is 118.5 (18.5 extra divided by 4 is like 4.5 %
more material so you may need to up the colours a bit - better wait to see
how the test look.
Too confusing? - perhaps someone else can explain it better -
RR
>> The Teal blue - using frit 3124 will not melt well at cone 6 for
>> starters -
>> should that be frit 3134?
>
>Ron, I forgot to ask, is there a flux I can add to the glaze made
>with 3124 to get it into the cone 6 range?
>If so what and how much?
>I am planning on taking the plunge and ordering glaze calc software
>after we get back from vacation next month.
>Maybe I can answer a lot of my own questions from now on.
>Thanks for your help.
>Lou
>
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Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
louroess2210 on tue 4 apr 06
On Apr 4, 2006, at 12:28 AM, Ron Roy wrote:
>
> Wait - I think I got it using some whiting and frit 3278 - better
> try it
> using a quarter of your original batch - then divide this by 4
>
Ron, Since I don't have any Frit 3278 I'll try your first suggestion
and let you know how it comes out.
I'm going to take some pictures of the bowl we've been tdiscussing
and send them to you directly. It will give you a better idea of
what I'm talking about.
Thanks again for all your help.
Lou
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