[Clayart] Iron

Paul Gerhold gerholdclay at gmail.com
Sat Jul 15 07:06:58 EDT 2017


Antoinette,
Iron oxide does not change under any conditions that your supply would experience. I have been using the same supply of RIO for thirty plus years and no changes have occurred.  Probably a problem with some other chemical.

Paul

Sent from my iPad

> On Jul 13, 2017, at 8:20 PM, Porcelain byAntoinette <porcelainbyantoinette at gmail.com> wrote:
> 
> Hi guys. I have mixed up a iron red glaze that I did not mix for a while. I used ingredients that is 10 years old and older end the end result was a flat brown instead of the reach read brown that it was before. 
> I repeated the recipe, thinking I made a mistake, ending up with the same results. 
> Then I thought maybe I used the wrong recipe and compared it with similar recipes getting to the conclusion that I did not make a mistake. 
> So someone said the problem is the iron that changed over time. This was the first time I heard that in all the 36+ years I am in clay. Is that true and if so, can I fix it? I assume that if that is true, it has to do with the oxidation process. 
> Antoinette Badenhorst. 
> 
> Sent from my iPhone



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