I am afraid that the bone will not stand the heat, unless -
perhaps - I find a really thick bone.
First, I buy cuttlebone from Cuttlebone.com, and you can buy REALLY
big, thick cuttlebones from them.
Second, I haven’t felt the need to do this, but I understand you can
soak the cuttlebone in “waterglass”-- sodium silicate-- to make it
much more durable. I’ve read that it can stand up to multiple
castings when treated with sodium silicate. Maybe someone has
actually tried this?