Editor’s Note: This article was first published in the 2002 TAGA Proceedings. Metallic inks have long been used to enhance the value and convey quality of the printed piece. As with any ink, it is necessary to measure the optical density of the ink with a densitometer or spectrodensitometer to ensure correct color and print quality. It had been determined that densitometer readings for metallic inks among several instruments out on the market did not correlate well if the ink film thicknesses w...