Not exactly true Shan. Those recipies are for the Pantone colors used in their top secret propietary printing plant where they have a specialy designed printing press and proprietary inks to print the books, chips, etc. You will notice they use warm red, reflex blue, trans white, etc. These are not offset inks. But yes if you have a good eye for color it can aid you. Others will be baffled by it. What is the opacity of their trans white? Only they know.