Aunc.3390 net.games utzoo!decvax!duke!mcnc!unc!bch Mon May 3 00:56:19 1982 Re: Third method of color presentation References: whuxlb.230 The method of producing color by varying black and white luminance was tried briefly in 1966 by 7-up. It failed dismally because it worked only in the studio. The vagueries of signal propagation made it seldom if ever seeable outside studio monitors. I noted at the time that the commercials also took advantage of human suggestability by saying if "You look real hard, you *might* see color..."