From TerraFirmaCraft Wiki
|Raw Iron Bloom >= 100%||Refine||Refined Iron Bloom|| Work on at least a Tier 2 anvil.
|Refined Iron Bloom 200%||Split||Refined Iron Bloom 100% x2||Only needed for blooms over 100%. If starting bloom isn't a multiple of 100%, it will split into as many 100% blooms as possible as well as a single bloom with the remaining %. For example: A 360% bloom will split into 3 100% blooms and a single 60% bloom.|
|Refined Iron Bloom 100%||Hammer||Wrought Iron Ingot|
|Refined Iron Bloom < 100%||Melt||Unshaped Wrought Iron|| Melt refined iron bloom into wrought iron in the forge with a ceramic mold in the side slot, or in a crucible.