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Custer Feldspan vs Soda Feldspar

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Oops, I am a new potter and accidentally used Custer Feldspan  instead of Soda Feldspar. What should I do?

Thanks!

cone 6

2000g Batch

Gerstley Borate 634g

Flint (Silica) 594g

*asked for Soda Feldstar used Custer Feldspan 396g

Talc 277g

EPK 99g

 

 

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It may affect things like colour response, particularly if you’re using copper. 

Sodium is needed to push copper towards a turquoise colour, rather than something more green.

And it might make a difference in your glaze fit, depending on how well the original glaze fit your clay in the first place, although as noted in the article above, probably not a big difference there. 

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I do not fire to cone 6 so its a test and see deal.Now that you have mixed it try it.

In high fire (cone 10) most of of all my glazes uses potash feldspar. Which for most is custar. For me its a lifetime supply of Kingman feldspar I bought in 1982 as they closed the mine.

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