著者

益子 賢蔵 宮本 卓之

出版者

日本法科学技術学会

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.2, no.1, pp.21-25, 1997

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&nbsp;&nbsp;The method studied in this paper is developing latent fingerprints based on ruthenium tetroxide (RuO₄) method. Ruthenium tetroxide fuming promptly react with various organic compound, particularly oils or fats contained in sebaceous secretions in latent print and producing brownish black or black ruthenium dioxide (RuO₂).<br> &nbsp;&nbsp;Ruthnium Tetroxide is yellow, volatile crystails (melting point; 25.5&deg;C, boiling point; 100.8&deg;C) at room temperature.<br> &nbsp;&nbsp;Conventional methods using RuO₄ have been almost impractical because it is very difficult to handle by its strong oxidizability. Additionally because of the two liquid method, it is not only troublesome to produce RuO₄ fumes immediately before developing latent fingerprints, but also is difficult to produce necessary ammounts of RuO₄ fumes.<br> &nbsp;&nbsp;In this method, these problems were resolved by utilizing a saturated hydrocarbon halogenid solution of RuO₄<br>