[Black stoneware look chalky when dry]

11 hours ago, neilestrick said:

You said before that it was chalky after firing, too. Did you mean after the bisque or the glaze firing? How does it look after glaze firing? If it's fine after glaze firing I wouldn't worry about how it looks before firing.

Not sure about the glaze firing, I have not gotten that far yet. I’ll be running the kiln in a few days hopefully and then I’ll be able to see if this batch bisque fires chalky as well. 

[Black stoneware look chalky when dry]

8 hours ago, neilestrick said:

What brand and model of clay is it? What cone are you firing to?

It’s Sio-2 PRNI black stoneware, firing to come 5 or 6. But the chalkiness is happening before firing, just as it dries normally. 

[Black stoneware look chalky when dry]

I have this black stoneware clay that has been drying and firing really light. It almost looks chalky when it’s dry. Even after it’s fired it’s still chalky and like it has a dusty white tinge to it. It is very dark when wet, and the first time I used it the Color was very dark after firing. Any insight into how or why this changed? Or how to fix it?