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Showing results for tags 'absorption'.
I recently pulled out my first mugs from a cone 6 firing. I used Draycott Stoneware from Potclays, UK and fire in oxidation to 1050 degrees c slow bisque and 1222 in a glaze firing, slow cooling to achieve matte surfaces with my glazes. I glazed the inside of the mug with a commercial transparent glaze from Scarva pottery supplies (so unsure of the CTE) and the outside of the mug with a satin matte glaze that has a CTE of 6.5. After a week of test using the mug (pouring boiling water I know will have exacerbated the problem), 2 big hairline cracks appeared on the inside of the mug. I smashed t
On a recent Clayflix tutorial by Lisa Naples she mentioned she fires her earthenware to cone 1 or 2, which reduces the water absorption rate by a huge amount and renders the clay almost vitreous. Does anyone have experience with this and, if so, what clay do you use?