40x Molten Solder gives 4 Solder (Solder Smelting 1)
40x Molten Solder gives 2 Solder Coil gives 8 Solder (Solder Smelting 2)
This must have been copy/pasted from "Copper cable coil" recipes : it worked then because 1 Copper plate gives 2 Copper Cable, so the ratio was OK. But "1 Solder gives 2 Solder" seems OP
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