As I do a lot of casting I have accumulated a batch of sprues and
buttons, and would like to use them in casting new items. I know
that I must add at least 50% fresh metal for each cast.
However, I wonder if I should convert the sprues and buttons to
grain. Or should I just put them in the crucible, and as they are
large, get them almost molten, and then add fresh metal and continue
to melt them together.
If it is better for me to convert the sprues and buttons to grain,
what is the proceedure. I know that I should melt them, then plunge
them into a bucket of water. However, how close to the water should
I bring the crucible before pouring the metal? I have had
conflicting advice. Some suggest pouring from a distance of about 2
feet. Others had told me to bring the crucible right up to the water
and then pour.
I am concerned about the safety of this process, and will appreciate