A method is described which allows a quick evaluation of a large number of spectral reflectance (transmittance) curves which with respect to a given light source and the 1931 C.I.E. standard observer produce metameric colors. The method is based on a precalculated set of linearly independent <i>metameric blacks</i> and demonstrated by a numerical example.
GÜNTER WYSZECKI, "Evaluation of Metameric Colors," J. Opt. Soc. Am. 48, 451-452 (1958)