Pigment and dye additives
In the recent invention of anti-counterfeiting technology, there is a “discoloration” pigment. These additives contain multilayer polymerized light reflective coatings, which are coated around a reflective aluminum chip, making the color of plastics change with the different viewing angles. The change of color, for example, from red to green, is due to the interference of the light waves reflected from different layers of the pigment by the interference of the angle. Discoloration pigments have a significant aesthetic effect on plastic consumer products, and because these effects are not easily cloned, they also have anti-counterfeiting functions. A way to identify whether plastic products come from a regular factory is to mix plastic bottles with pigments or dyes, and analyze the exposed areas and ultraviolet regions with spectrometer, and those pigments or dyes will show unique patterns.

 

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