Dears
I recently made tea pots based on the old japanese houhin design. Hence it does not need a metal seeve. However, after using them some dark spots appear on the bottom side. Perhaps this is just the color of the tea slowly leaking through. I wonder if it could be an unhealthy fungus.
It was fired approx 1250 degrees.
For comparision, the inverted teapot on the top right of the photo does not have dark spots. Because it is glazed on the inside as well.
Any experience or ideas on that?
Thanks.
kind regards
Zustand