* The copper can be combined into one lump , as only the amount required is used.
* The zinc can also be combined, in which case all of it will be used (but not wasted, it will use more copper and produce more brass).
* When creating, the [[quality]] of the zinc lump affects your success chance.
== Old Behaviour ==
* A working ratio is 1:1kg, 2:1kg, and even 1:2kg of copper to zinc.
* The example ratios above will all result in a 0.20kg [[brass lump]].
* Warning: Do not combine lumps before creating brass. 1kg of copper + 1 kg of zinc give you 0.2 kg of brass, however 4kg of copper + 4kg of zinc only give you 0.4kg of brass. A 50% loss due to them being combined into larger lumps.