sentences:  At Eastman Kodak, among many other things, he helped to establish the theoretical basis for color photography, including color masking as compensation for unwanted dye layer absorptions.While still studying, MacAdam published in 1935 two papers on the theory of optimal object colors in which he showed the results of his calculations of the optimal object color solid raised over the CIE chromaticity diagram, using the newly established CIE standard observer and illuminant C and A data from 1932.One of MacAdam's best known contributions was in support of technological color control.