Pat Southwood on sat 16 jul 05
It's coming off because it's only half cooked.=20
You have got stuff in there that hasn't melted.=20
It sounds more like an engobe that would mature at stoneware temps.
A very easy white slip recipe is;
one cup full of china clay=20
one cup full of ball clay.
It might not fit your clay body, but it has fitted every body I have =
I would go mad if I had to faff about with that much stuff in a slip!