... 4 is a versatile post oxidized, regular color gas carbon black for masstone coloring and tinting of solvent and ... use in printing and duplicating inks, coatings, paints, paper, carbon paper, impact transfer printing, and plastics.Printex U PowderPrintex U ... use in printing and duplicating inks, coatings, paints, paper, carbon paper, impact transfer printing, and plastics. special black pigment black ...