Before you waste too much time with this "clay", test fire a small piece of this stuff in a bowl. If it melts, it can not ruin your kiln shelves.
BTW, someone's free crap can cost you your kiln.
LOL, what if it's not terracotta at all but a red iron oxide rich glaze? If so, this will be one of those o_O moments.
- Babs likes this