A new algorithm is suggested for color-recipe formulation. Whereas previous algorithms solved for recipes using, in turn, all possible combinations of three colorants from a given list, the new algorithm finds directly both the colorants to be used and their proportions. This is done by fitting the problem to a linear program and using existing solution algorithms.
Pierre R. Bélanger, "Linear-programming approach to color-recipe formulations," J. Opt. Soc. Am. 64, 1541-1544 (1974)