iandol on tue 20 mar 01
Dear Ilene,
Thank you for your response.
The reasons why I do not wish to use oxides and carbonates are personal =
prejudice and a belief in chemical thermodynamics.
I believe using silicates will give me a better response. The process of =
dissolution of highly refractory oxides and initiating chemical =
reactions which ensure silicate structures, which I wish to nucleate and =
grow, may retard crystal growth if they do not occur within the =
timeframe of a firing.
I did not infer that I would be unwilling to use other colouring agents =
once I had established that this was a viable way of making a =
crystalline glaze. But before I get to that stage the hypothesis has to =
be tested. Hence my request for help with the formulation of tenable =
recipes.
By the way, what is the chemistry of your crystalline glaze. This seems =
high for the usual zinc silicates to nucleate and grow. How long do you =
dwell at this temperature?
Thanks for showing an interest.
Best regards,
Ivor Lewis
ILENE MAHLER on tue 20 mar 01
Each glaze base fires to a different tune temp.time hold etc...I am
working with 2300...not lower...Ilene in Conn
iandol wrote:
>
> Dear Ilene,
>
> Thank you for your response.
>
> The reasons why I do not wish to use oxides and carbonates are personal prejudice and a belief in chemical thermodynamics.
>
> I believe using silicates will give me a better response. The process of dissolution of highly refractory oxides and initiating chemical reactions which ensure silicate structures, which I wish to nucleate and grow, may retard crystal growth if they do not occur within the timeframe of a firing.
>
> I did not infer that I would be unwilling to use other colouring agents once I had established that this was a viable way of making a crystalline glaze. But before I get to that stage the hypothesis has to be tested. Hence my request for help with the formulation of tenable recipes.
>
> By the way, what is the chemistry of your crystalline glaze. This seems high for the usual zinc silicates to nucleate and grow. How long do you dwell at this temperature?
>
> Thanks for showing an interest.
>
> Best regards,
>
> Ivor Lewis
>
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