Via the New York Times, this very fun trip to an ancient Japanese steel foundry:
...Safety was paramount because around the flames, at various stations, milled a team of some 20 excited tourists, a mix of both Japanese and a few foreigners, all dressed in very hip dark gray jumpsuits. These were people paying roughly ¥200,000, or about $1,500, for the chance to be a worker in a tatara-ba for a day and night. (They would get to keep the jumpsuits and a small piece of raw steel as souvenirs.) Their faces and hands were streaked by charcoal.
Jewel steel is produced by sprinkling iron sand — alluvial (river-deposited) sand saturated with iron — slowly over a charcoal pit. The tourists spent hours chopping the pine charcoal to precise sizes. They used scoops woven from bamboo to gather heaps of charcoal and dump them atop the furnace.
Off to the side stood a man named Noriaki Yasuda. He was the designated conductor — called a murage — of this slow dance between heat, charcoal and dampened iron sand. Dressed in an electric blue jumpsuit, he stood out in beautiful, almost poetic, contrast to the licking orange flames.
Monitoring the airflow, the color of the fire and the height of the charcoal with paternal concern, Mr. Yasuda scowled and watched, sometimes retreating to sit in his dark alcove, his arms crossed, still scowling and watching. To produce steel using the tatara technique, it turns out, you spend a lot of time watching.
I'm delighted (and not surprised) that there is a touch of chemistry:
...“Steel is just iron with a little bit of carbon,” Mr. Yasuda explained to me. When I finally built up the courage to talk with him, his face lit up in a wide smile from behind his mask. (Everyone was wearing masks, less out of Covid concerns and more because of the charcoal dust.) He casually led me to a blackboard in the back of his resting space and sketched out the basic chemical formulas of what was happening in the furnace, how charcoal serves two purposes. First, it burns much hotter than wood. And second, its carbon atoms are essential to the formation of steel; embedded between iron atoms, they increase the strength of the metal.
First, as someone who works in chemical manufacturing, I'm guessing that we cannot get tourists to pay $1500 to work a shift - more's the pity. It is also interesting how they are careful with the size of the charcoal - makes sense, i.e. more uniform pieces allow for better control of the heat. Fun article - read the whole thing.
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looks like Blogger doesn't work with anonymous comments from Chrome browsers at the moment - works in Microsoft Edge, or from Chrome with a Blogger account - sorry! CJ 3/21/20