Subtle reflected color differences not observable to the human eye reveal clues to inauthentic artwork.GEORGE SHU AND ALEXANDRE FONG, TRUTAG TECHNOLOGIES INC. AND HINALEA IMAGINGInauthentic artwork is a significant problem within the art world. According to the Fine Arts Expert Institute (FAEI), as many as half of the pieces in the art market are forgeries, equaling roughly $60 billion in inauthentic work. Current authentication processes, however, are often time-consuming and expensive. Forgeries are art pieces deliberately created in the style of an artist whose output is highly valued, with the intent to pass the work off as original, to deceive and perpetrate fraud. 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