Online Software Help Manual

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Metamerism is a phenomenon by which a pair of spectrally different samples match under one illuminant. Metamerism exists when two materials match under some lighting conditions but not under other lighting conditions. This can be a serious problem for manufacturers who combine various parts of different materials or materials from different sources into one product. A customer expects all the parts of a car that are the same color to match whether it is a sunny or cloudy day. Someone who buys a coordinated outfit expects the jacket and slacks to match in daylight as well as under the fluorescent lights of the department store.