I just cast a 7mm wide platinum wedding band with a comfort fit for a
friend, but the casting shrank much more than I expected. Without any clean
up it’s a size 11, and I need to get it to 11-3/4. I briefly tried
hammering it on a ring mandrel to open it up a bit, but then thought I
might try annealing it first to make it a little easier on myself.
Does anyone have any recommendations for annealing platinum (I’ve heard you
should run it through an ultrasonic first, for example), or for getting
this ring bigger without having to recarve it in wax and start again?
Thanks in advance for any suggestions!