I'm arranging a sort of 'pottery workshop' for some people at the local charity where I'm a volunteer, and I don't want (yet)to introduce glazing (mainly because we don't have the facilities or the money!) so I want to be able to fire the work to allow people to decorate their pieces with acrylic paint, say.
The clay we'll be using is pretty standard college stuff, probably mostly potclays 1124 (1100 - 1290) or similar.
I will be (single) firing it at home, and I would appreciate guidance on what cone to fire to - Cone 6 - 10, I'm assuming, might be too high to leave any absorbency and make painting difficult?
My guess is getting just above 'vitrification' temperature (if that's the right word) would be best - 1120, say?
A practical problem is that the lowest cone I've got is 5, so I'd have to fire to temperature if it were lower than that. (Not a problem, I could use the Orton cone calc program and my kiln logs to calculate time and temperature)
Or am I being too precious? I don't know if Acrylics work on glass - if the do then I don't have to worry!
Thanks for any input or suggestions .....