I have 2 plain wedding bands to shrink. 1 is 14kt palladium white
gold and the other is 18kt rose gold.
Should I anneal the 2 rings and then use the reducer to shrink
them? Or should I reduce them as they are?
To a degree, it’s your choice. The reducing dies, unlike stretching,
don’t much risk cracking the metal. If it’s too hard, you’ll simply
find it takes too much effort to shrink the bands. So try them. If
they seem to be too stiff to shrink, then anneal as needed. The
palladium white shouldn’t need it. The rose gold might. If you anneal
the rose gold, quench in alcohol to prevent brittleness or cracking.
Don’t air cool. If you can shrink them without annealling, they end
up harder, and thus better durability.