Platinum is indeed very 'sticky' or gummy - actually the material
sticks to a cutting
Paul’s writing aroused some curiosity in me, so I went snooping
around. This is an interesting article - I’ll past more if I find
them. Doesn’t answer the question, but it’s interesting…
a bit of stuff
Just a paste, not whole article:
Platinum alloyed with cobalt (Pt/Co) will make a very good
casting alloy. It's wet and capable of filling great detail
during lost-wax process casting.
Platinum alloyed with ruthenium (Pt/Ru) is a good alloy for use
in machining and lathe operations.
Platinum alloyed with iridium (Pt/Ir) has great features in
fabricating and all-purpose work.
Finishing.com had a couple of people asking the same questions,
but no answers..
Actually diamond cutting, but discusses tooling, plus this site is
the place to look deeper: http://www.pgi-platinum-tech.com/v11n3.html
And finally, the source:
Hope this helps - just sharing my own learning experience…