In the paper “A Practical Approach to Measuring and Modelling Paper Fluorescence for Improved Colorimetric Characterisation of Printing Processes” [1] it was noted that a limitation in applying this approach to modeling the effects of paper Fluorescent Whitener Additive (FWA) is the lack of affordable instruments capable of measuring the Ultra Violet (U.V.) content of the illuminant being used. Presented here is a novel indirect approach to estimating the illuminant U.V. using readily available instruments, that takes advantage of the same FWA model used in [1], thereby providing a source of illuminant U.V. characterization that is ideal for use with its FWA model.
Graeme W. Gill, "Estimating illuminant U.V. without a U.V. capable instrument" in Proc. IS&T 19th Color and Imaging Conf., 2011, pp 58 - 60, https://doi.org/10.2352/CIC.2011.19.1.art00013