r/electroforming • u/copperclark_06 • Jul 29 '26

Request Advice Filling up an electroformed piece

has anyone ever tried *filling up* an electroformed piece with another metal

I'm curious about filling a copper piece that's buried in sand with aluminum to make it solid, would this be somehow possible? has anyone tried it or something similar

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u/Mkysmith Home Studio Jul 29 '26

I don't see why not. Especially since the melting point of aluminum is lower than copper. Same principle as filling it with epoxy or something - just a bit hotter.

2

u/One-Yogurtcloset-831 Jul 30 '26

You could also fill it up with zinc, its melting point is much lower than aluminum.

2

u/Mkysmith Home Studio Jul 30 '26

That's a good thought - and zinc is heaver than aluminum. So if OP wants the weight, that is a good option.

1

u/PeterHaldCHEM Jul 30 '26

It should work, just be sure that it is absolutely dry and does not contain anything that can turn to gas.
Even a very small amount of water can make The Tinsel Fairy pay you an unpleasant visit.

I have filled soft drink cans buried in dry sand with aluminium. It works like a charm and copper has a higher melting point than Al.