著者

中山 俊介 大河原 典子 池田 芳妃 安部 倫子

雑誌

保存科学 = Science for conservation

巻号頁・発行日

no.51, pp.243-248, 2012-03-31

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The Filmon endless sound-belt,the subject of this report,is a celluloid sound recording media manufactured in 1937 by Nihon Filmon Co.,Ltd.at what is now Komae-shi,Tokyo. The sound belt was developed in Japan to overcome the short recording time possible on SP records,which at that time was the mainstream recording media in the world. It is an extremely short-lived recording media that disappeared in about 3 years with the development of magnetic tapes for recording. Although short-lived, the sound belt made long recordings at one stretch possible,which could not be done with SP records. Thus,valuable recording of kiyomoto, nagauta and other types of Japanese music have remained. The Department of Intangible Cultural Heritage of the National Research Institute for Cultural Properties, Tokyo and The Tsubouchi Memorial Theatre Museum Waseda University have embarked on a joint study and digitization of the Filmon endless soundbelts in collections of the Institute, the Museum and other museums as well as in private collections. This report discusses the method that has made it possible to restore and to re-listen to deteriorated (hardened, deformed) or severed Filmon endless sound-belts.

著者

中山 俊介 大河原 典子 安部 倫子

雑誌

保存科学 = Science for conservation

巻号頁・発行日

no.52, pp.243-247, 2013-03-26

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In the previous issue of this bulletin (Science for Conservartion 51, published in 2011), a report was made on a method for restoring deteriorated (hardened or deformed)Filmon Endless Sound-Belt. The previous method employed the typical characteristic of celluloid, that celluloid is a heat-reversible material. In other words,it starts to soften when temperature exceeds 65℃ and becomes completely soft when temperature exceeds 85℃ and reaches 100℃, but regains its hardness and resilience when cooled. However, there were several problems with this method. For instance, there was a risk that the unwound tape would become damaged in the process of rewinding it and that applying too much heat would damage the sound grooves. This year the previous method was revised to solve these problems and soften the sound-belt so that it can be replayed.