| 摘要 |
A method for producing thermoplastic plastic capable of grasping information concerning the production process even after distribution. In a plurality of production processes involving fusion of thermoplastic plastic (90), information concerning respective production processes is associated, and an information presenting substance (91) radiating fluorescence when it is irradiated with an electromagnetic wave in a specified wavelength region is added sequentially and dispersed. ® KIPO & WIPO 2007
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