History of spring materials and types of steel: Changes in properties and applications based on carbon content.
[Reproduction of Private Spring Preparatory School Lecture 25] The relationship between the transition of cultures such as stone tools, bronze tools, and iron tools and spring materials!
The history of humans making iron is very ancient. Long ago, there were evil demons in Japan, but Momotaro, who defeated them, carried a Japanese sword. There’s more to it. There’s the hoe of the old man from the tale of "The Dog Who Dug," the scissors of the greedy old woman from "The Tongue-Cut Sparrow," and the fishing hook of Urashima Taro—these are well-known even to children. These are iron products that appear in nostalgic fairy tales. For those who say such stories are unreliable, let’s refer to the "Nihon Shoki." Within the "Nihon Shoki," many famous swords are mentioned. In fact, various iron products have been discovered in ancient burial mounds in Japan. *For detailed information, please refer to the PDF. For more details, feel free to contact us.*
- Company：アキュレイト 東京カスタマーセンター
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