Wavelength-Dependence of Exposure-Induced Fluorescent Fading
Fluorescent whitening agents are widely used to increase the brightness and whiteness of printing paper. The fluorescence of these whitening agents is known to fall as a result of exposure to light, and the magnitude of the change has been documented in both accelerated fading tests and in exposure under more typical viewing conditions. In this study we exposed prints on optically brightened papers to narrow-band radiation at 350 nanometres, using a double monochromator. The change in spectral reflectance was found.
OUYANG Yun, XU Min and YANG Li
S. Y. Zhao and P. Green, "Wavelength-Dependence of Exposure-Induced Fluorescent Fading", Advanced Materials Research, Vol. 174, pp. 337-340, 2011