| 摘要 |
Particles for identifying are provided to easily identify objects containing particles and to prevent reproduction due to concentration gradient of two materials. Particles for identifying comprises a body mixed with two materials and has concentration gradient of two materials. The two materials are the materials having different colors. The concentration gradient is the concentration gradient of color. A device for manufacturing the particles for identifying comprises a first injection hole(210), a second injection hole(211), a mixing unit(220), a concentration gradient generating unit(230), a plurality of channels(241,242,243,244,245), and a unit for generating particles for identifying. |
