Originally posted by The Phoenix:

Something I dont understand.
So you get say Copper Ore. Copper Ore Weighs 10 pounds
You put it into the thing to melt it down and remove the Impure parts
of the Ore. SO your taking away some Weigh of the Ore.
BUT As soon as it becomes a Bar. It Gains 2 pound making it 12 pounds
Where the 2 extra pounds come from?
it should not be heavier. It should be Lighter if not , then the same weight.

and also mind you, that you need some "impurity".. otherwise, a pure copper sword would be very easy to bend, so you need some of that Coal/Carbon toughness.