: KatzPots - Viewing Profile

Thanks guys. This is just what I needed to know and suspected. I realize now that earthenware is too porous to use for anything that holds liquid for any length of time and now know that glazing won't change that. Good info.

Can I get some clarification on this issue because I just found a similar problem.


I am using an earthenware clay that I bisque fire to cone 04 and glaze at cone 05, as recommended by the clay manufacturer. I put flowers in a vase and set it on my table. Today I picked up the vase and the table had a damp ring where the vase was sitting. Thus, my search on the forum for more information.

So what's the solution? Is the problem with the bisque temperature? Do I need to test the clay by bisque firing to a higher temperature and test for leaks, as suggested? I was not aware that I could not depend on what the clay company suggested as the proper firing temperatures.

I surely don't want to ruin any furniture! Thanks!

Jayne mentioned in the article that she developed her own clay bodies and she included the formulas for those in the Recipe section. The red glazed goblet is stoneware, according to the article. She also mentioned that it is a "red saturated glaze" so Neil may be correct in the amount of iron having to do with the coloration.