Fluorescent carbon dot flexographic printing ink anti-counterfeiting method and printing ink and preparation method thereof

The invention belongs to the technical field of anti-forgery ink, and particularly relates to a fluorescent carbon dot flexographic printing ink anti-forgery method, printing ink and a preparation method thereof, which are characterized in that fluorescent carbon dot flexographic printing ink with various excitation wavelengths is printed on a packaging material in a printing mode, and when ultraviolet lamps with different wavelengths irradiate, fluorescent patterns emitted by carbon dots in the printing ink are different. The method has the advantage of being good in anti-fake performance. 本发明属于防伪油墨技术领域，具体涉及一种荧光碳点柔印油墨防伪方法及其油墨和制法，其特征在于通过印刷方式，在包装物印刷多种激发波长的荧光碳点柔印油墨，当不同波长的紫外灯照射时，油墨中碳点发出的荧光图案各不相同。本发明具有防伪性能好的优点。