Natural Scientific Research for Raw Materials and Technologies of Japanese Ancient Iron Swords

(1)考古学研究：对日本古代铁剑之一的Warabiteto进行了考古学研究。出土于宫城县的的出土时间、地点、制作年代、形制、颜色、保护处理等，岩手县、福岛县和北海道县。对其中一只Warabitetos进行了取样，并进行了以下自然科学研究。(2)自然科学研究方法：自然科学研究方法的研究，建立和应用于分析Warabiteto，因为他们没有被研究。对化学分析法和辉光放电质谱法进行了元素分析研究。扫描电子显微镜法结合X射线显微分析仪进行观察，铅同位素质谱法进行产地评价。本研究者齐藤勤博士在1994年在中国召开的BUMA（金属和合金的使用开始）-3会议上宣读了关于最新铅同位素方法的论文。(3)Warabiteto的繁殖实验：在岩手县大东镇的大原进行自然科学实验Pref.in 1994年，在铸剑师Taira Sugawara的帮助下。Mochitetsu，特别是在这个城镇附近生产的磁铁矿铁矿石被用作原材料。Mochitetsu在约1300 ℃下用木炭还原3小时。还原铁被重新加热，锤击和抛光，以复制Warabiteto。从分析和实验的结果来看，Mochitetsu具有Warabiteto原料的可能性，因为它非常纯净，并且在低温下容易还原为铁。

(1) Archeological Research :Warabiteto, one of the Japanese ancient iron swords, was archeologically researched. Excavation time and place, production period, shape and color, conservation treatment, etc of Warabitetos which were unearthed in Miyagi Pref., Iwate Pref. Fukushima Pref.and Hokkaido, were researched. One of Warabitetos were sampled and subjected to the following natural scientific research.(2) Natural Scientific Research Method :Natural scientific research methods were studied, established and applied to analysis of Warabiteto, because they had not been studied. Chemical analysis method and glow discharge mass spectrometric method were studied for element analysis. Scanning electron microscope method with X-ray microanalyzer for observation and lead isotope mass spectrometric method for production site estimation. The paper on the last lead isotope method was read by this investugator, Dr.SAITO,Tsutomu in BUMA (Beginning of Use of Metal and Alloy) -3 Conferece which were held in China in 1994.(3) Reproduction experiment of Warabiteto :Natural scientific experiment was carried out at Oohara of Daito town, Iwate Pref.in 1994 with help of Taira Sugawara, swordsmith. Mochitetsu, magnetite iron ore especially produced near this town was used as raw matearials. Mochitetsu was reduced by charcoal at ca.1300ﾟC for 3 hours. Reduced iron was reheated, hammered and polished for reproduction of Warabiteto. Mochitetsu has possibility of raw matearials of Warabiteto, because it was very pure and easy to be reduced in low temperatures to iron, from the results of analysis and experiment.