[tripletmass]

Diamond tetramers have good compressibility; aluminum exactly that of Reynold's Wrap happens to have not only adequate alumina and vanadium alloyed with it so that when it is thinned by pressure flow it to under 5nm it will be solid.

Pressurizing is done carefully so that nothing important is sacrificed to flowing or a flowable channel of metal! The ruby can help, with staged failsafes of pressure removal e.g. of hydraulic oil to mics pressurizing the anvil.

On Gaskets: https://pdfs.semanticscholar.org/1d2c/f4b386e2113f863d46cec5...

Doesn't cover doing it at microkelvin with a helium still co-located, which seems special! Can't one just be happy with experimental cosmology (to find a purified hydrogen body in telescope range...)