I bought a couple of bags of cone 6 porcelain. I don't remember which clay it is. I threw some pots and am ready to fire.
1. Can I tumble stack the bisque fire? I had read that porcelain needs a special kiln wash. Is that with glaze fire only? With the porcelain pots stick to each other during the firing? can I stack stoneware pots with the porcelain?
2. I made some slip with the porcelain clay. I covered some red stoneware at leather hard with it. I tried to do some decorative finger swipes in the slip. Didn't work well. Do I need to add other ingredients to the slip to get the kind of look I am going for? What are the chances the slip will stay on the pot through the bisque? I had heard not to mix stoneware and porcelain. Why is this? I have read several time of porcelain slip on stoneware...
Any and all other suggestions are welcomed.