Where does “アルミ箔” come from?

アルミ箔 (Japanese) comes from Japanese 箔, from Middle Chinese 箔.

アルミ箔 (Japanese): aluminium foil

Definitions

Step	Language	Word	Meaning
1	Japanese	箔	foil, leaf
2	Middle Chinese	箔	—

アルミ箔 — Etymology, Origin & Word History | Etymology Explorer