I was reading the previous discussion about re-firing a blistered pot and I wondered how far down the problem went ... thinking you could not just aim the solution at the last problem. The blisters could have nothing to do with the glaze but some random component in the clay that might never happen again??
Say you have a pot that has been treated somehow ... be it glaze or a wash of oxide or an input of salt or soda in the previous firing ... and you want to fire it again for whatever reason ... do you always have to take into account what has been done before or are there any ingredients that simply fire away?
In a salt or soda firing, isn't the salt or soda still there somewhere on the surface waiting to have an effect on the next thing?