Many ISO ,ICC profile like Fogra 39 , gave many TAC value 300%, 320%. As I know the most TAC will got more Color Gamut than the Less TAC, in the old day ,before Color Management Genration, I remember everyone do the color separation with 320-340% for Coated paper, this amount of Ink. Ink still can dry without the dry back problem. But now why they use less TAC in ISO Standard Profile? They will get less color Gamut, Why we don't want larger Color Gamut? Anyone have the answer? Why they go to 300% TAC? See now we are talking about the XCMYK which higher color Gamut.