Platinum Ring stretching problem

[Dennis]

My reticence has a purpose. I have often enlarged gold and silver rings buy stretching, but platinum is not in my field.

As far as I have read it is capable of being annealed by heating to an orange colour and then quenching, but I would hate to have you damage your ring. Hence my rant about that primitive ring stretcher.

I also understand that platinum is easily contaminated when heated, so it should be done on a fresh clean surface.

Other members here have first hand experience of platinum, but I'm afraid they will be involved in the usual end of year rush. Dennis.