Laser Journal, Volume. 46, Issue 2, 34(2025)
Design and performance analysis of semi-transparent light interference anti-counterfeiting pigment
A high-wave semi-transparent optical interference pigment with a main wavelength of 665nm and a color effect of purplish red to yellowish green was prepared by using 5 layers of full dielectric film system with alternating stacking of high and low refractive index films, titanium dioxide for high refractive index layer and silicon dioxide for low refractive index layer. The transmission spectrum and reflection spectrum of the sample in the three states of film, film powder and pigment were detected by the UV-3600i Plus UV-visible near-infrared spectrophotometer of Shimadzu. The practical application effect of the ink made by mixing the pigment sheet with light curing ink was tested by scraping sample. The results show that the prepared pigment can clearly display the text or pattern on the bottom plate under the premise of retaining bright colors and obvious anti-counterfeiting effect with the corner. The coating of the pigment can provide anti-counterfeiting effect with the corner and improve the anti-counterfeiting ability of the logo under the premise of retaining the anti-counterfeiting design effect of the logo.
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LIN Zhenpeng, XU Yingchao, SUN Weiping. Design and performance analysis of semi-transparent light interference anti-counterfeiting pigment[J]. Laser Journal, 2025, 46(2): 34
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Received: Aug. 12, 2024
Accepted: Jun. 12, 2025
Published Online: Jun. 12, 2025
The Author Email: XU Yingchao (ycxu@xmut.deu.cn)