Anti-counterfeiting characteristics of spectrum-fingerprint fiber
GE Mingqiao · Textile Research Journal · 2013
To promote the application and popularization of spectrum-fingerprint anti-counterfeiting fiber,nine kinds of fiber samples were prepared and their anti-counterfeiting characteristics were studied by means of fluorescence spectrophotometer.The results showed that spectrum-fingerprint fibers made by different raw materials and spinning process parameters had different emission spectra when excited with specific exciting light,which were unique,just like the fingerprint of human beings.The emission spectral curve of spectrum-fingerprint fiber had excellent reproducibility,as shown by repeated measurements,and had no observable change after being stored for 6 months,washed for 2 h,under light irradiation for 5 h,being treated for 2 h at 120 ℃,or being treated under acidic or basic condition for 2 minutes.But the emission intensity decreased by 0.7% after being stored for 12 months and decreased by over 10% after being treated under acidic or basic condition for 5 min,meanwhile the emission wavelength had no change.Therefore the fiber should be stored in a dry environment and long-time corrosion by acid or base should be avoided.