Plastic product containing luminescent material and method for determining authenticity of same

A method of determining authenticity of a plastic product, the method comprising:

• a step (a) of irradiating the plastic product with first light of a first wavelength;
• a step (b) of detecting a second light of a second wavelength emitted from the plastic product;
• and
• a step (c) of determining authenticity using the detected emitted light.

An authenticity determination device for determining authenticity of a plastic product, the authenticity determination device comprising:

• a light source unit configured to emit first light of a first wavelength toward the plastic product;
• an emitted-light determination unit configured to detect second light of a second wavelength emitted from the plastic product which is irradiated with the first light;
• and
• a verification unit configured to receive a detection result from the emitted-light determination unit and determine the authenticity of the plastic product.

A plastic product with authenticity to be determined, the plastic product comprising:

• a base having a surface on which a mark is printed;
• and
• a luminescent material included in the mark and configured to emit light including a second wavelength with respect to incident light including a first wavelength,
• wherein the determination of the authenticity is performed by irradiating the mark with the incident light and then detecting the emitted light.