Tanning Fluid

category:liquids
Tanning Fluid is used to produce leather when added to a Tanning Tub.
==How to Acquire==
You can put bark into water to get tanning fluid. Tanning fluid has a concentration percentage depending on how much bark you have put into it. 
The tanning fluid needs to have a concentration of at least 5% to be active.
Bark can be added into buckets and barrels of water, or directly into tanning tubs. 
==Quality==
Tanning Fluid Q = \frac{_{q}Water + _{q}TreeBark}{2}