I don't do pottery but I do own my own ceramic shop. You might consider the
kiln. If an element is not working or if the kiln is not firing hot enough,
it could be under-fired bisque. Try using a witness cone test firing. Good
luck.
"JM" wrote in message
...

Is there a chance that the pots got cold..... As in freezing cold???
that'd
do it.....
Hugs
Eddie

Thanks Eddie,
I really appreciate all your inputs everyone...
I dont think that the conditions at college would get that bad - I think
Health and Safety might have something to say about that. Plus, my studio
at home is constantly heated - ok its not needed during the summer months,
but as soon as it starts getting colder I put the heating on in there. It
never gets under 10oC.
Any other suggestions?
JM