3 ms·

Just make sure that the metal you use has a high enough melting point.

• Wistar 8mo ago
  Tungsten, perhaps.
• direwolf20 8mo ago
  Do people usually find big pools of metal on the ground in burned houses, or is everyday metal fine? Especially inside a fireproof safe. Wouldn't trust aluminium, solder, Wood's metal, gallium, or mercury, but apart from that...
• wtetzner 8mo ago
  Maybe a clay tablet (assuming it's safe from water)?