Tar Kiln

Category:Light Sources
The tar kiln is used to get coal from wood blocks or boards. It also produces Tar as a byproduct, which you can take out in a bucket or barrel.
== How to Use ==
Fill it with blocks or boards, then light the tar kiln using a torch or other fire source. The tar kiln can hold 80 blocks or 40 boards, and it takes ~ 3.5 real days to burn no matter how much wood is in it. Each block becomes 2 coal, one board equals 1,5 coal.
== Quality ==
Tar Kiln Q = \frac{_{q}AvgClay + _{q}AvgStone}{2}
Tar and Coal Q = \frac{3*_{q}Wood + _{q}TarKiln}{4}
== Tips ==
* Due to boards being usually higher quality than blocks, it is recommended to use them for making high Q coal.
* When adding blocks/boards to the tar kiln, the quality of the blocks/boards will average after each addition. If you want to make high Q coal, avoid putting in any lower Q blocks or boards. Each additional low Q block/board will bring down Q by 1 at least.
* The tar kiln burns based on the amount of wood in it. If you need coal fast, then put in less wood. Cooking time is not linear, e.g. 80 blocks cooked at the same time will finish faster than 40 followed by another 40.[?]
* As the World 10, it should now take ~3.5 RL days to finish burning coal.
* In World 10, the kiln must be at least half full to start.
* Different types of wood give different results, pine being the most efficient.