Over three days and three nights, smelters using ancient techniques shovel roughly 25 tons of iron-bearing river sand and charcoal into the mouth of a tatara, a rectangular clay furnace built ...
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How Budget-Friendly Charcoal Can Extend The Life Of Your ToolsThat's where the bag of charcoal you already have comes in handy. Rust (iron oxide) is a chemical reaction that happens when iron is exposed to water and oxygen over a certain period of time.
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