But there’s a potential problem. the final viewed color is influenced by the paper on which materials are printed. That’s because fluorescent whitening agents (FWAs) are used on many kinds of paper used for printing which make the paper appear brighter. When viewed under Illuminant D50*1, the effect of the paper’s fluorescence on the color of printed materials is particularly large. For this reason, ISO 13655-2009*2 defined Measurement Condition M1 as having illumination corresponding to CIE Illuminant D50, which minimizes differences in measurement results due to paper fluorescence, an effect that was difficult to measure with conventional handheld spectrodensitometers.
Utilizing Konica Minolta’s original VFS (Virtual Fluorescence Standard) technology in the FD-7 spectrodensitometer offers a unique solution to this problem by enabling color evaluation while taking into consideration the fluorescence of the paper under Illuminant D50, the standard light source for color evaluation used by the printing industry. These are the first instruments to provide measurement results that correspond to ISO 13655 Measurement Condition M1.