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Yes, 64








There are multiple ways to obtain Flux. A few types of Stone (Limestone, Dolomite, Marble and Chalk) can be cooked into Lime, which can be subsequently made into Flux. These are known as Flux Stones. Seashells can also be cooked into Lime.

Flux Stone
Grid Rock (Dolomite).png Dolomite Grid Rock (Marble).png Marble Grid Rock (Limestone).png Limestone Grid Rock (Chalk).png Chalk

Scallop Can be heated in:
Grid layout Small Arrow Down.png Grid Firepit.png Grid Pit Kiln.png Grid Forge.png
Lime Temp: Bright Red⋆⋆⋆⋆

Ammonium Chloride Powder, which drops from breaking Salammoniac that generates around lava pools, can also be crafted directly in the crafting grid into Flux. Borax can be ground in a quern to make Flux.

Borax Ammonium Chloride Powder Lime
Grid Quern.png
Grid layout None (small).png
Borax Flux6
Ammonium Chloride Powder Flux
Grid layout Arrow (small).png
Grid layout Shapeless.png
Lime Flux
Grid layout Arrow (small).png
Grid layout Shapeless.png



Flux is required in the anvil in order to weld Ingots into Double Ingots, Metal Sheets into Metal Double Sheets and for moving from Stage 1 to Stage 2 in the smithing of Armor.

Blast Furnace

In order to process iron ore, the blast furnace requires an equal amount of flux for each individual ore piece to be thrown in at the same time.


v1hLimestone, dolomite, chalk and marble can be turned into flux. Recipe is hammer + cobble
v2 Build 7Flux will now be used when welding
v2 Build 15Fluxes should again use the correct rock types
v2 Build 17Borax can now be used as a flux. It yields 6 flux.
v2 Build 26Flux can now be processed from borax using a Stone Hammer, however the hammer will be lost in the process
77.6The Blast furnace now properly only accepts ore at a 1:1 ratio with flux. It will no longer suck up any ore unless there is flux present as well.
77.10Should be possible to place a stack of flux in an anvil now.
78.0Fixed shift clicking of flux into an anvil to do the whole stack instead of just one.
82.0Removed heated gypsum as a source of flux. The ability to do this was a bug.
83.0Added ammonium chloride powder, which can be crafted into flux.

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