Formulations of positive films in order to obtain the selection of colors by means of primary balanced colors, and method for obtaining such formulations

A method of obtaining positive film compositions to make a color selection, wherein said compositions comprise an emulsion sensitive to any type of light and a photographically accepted vehicle, having physical properties which permit a color selection for establishing bichromatism, wherein for bichromatisms (A), (B) and (C) said method comprises:

• a) establishing the different combinations of the three primary colors yellow, magenta, and cyan, for each of bichromatisms (A), (B) and (C), as well as the amounts in volume required for said primary colors, so as to be able to obtain the corresponding density of every of the different combinations of said bichromatisms (A), (B) and (C), and to balance every one of said different combinations;
• b) determining the gray color equivalent for the different combinations of said three primary colors corresponding to each of bichromatisms (A), (B) and (C);
• and c) obtaining the amounts of emulsion and vehicle for the different combinations of said three primary colors, corresponding to each of said bichromatisms (A), (B) and (C).