M1 is measuring printed sheets with a defined amount of UV light added to the white light, so the optical brighteners in the paper can be excited and included in the measurements. The results from the current study show that the application of water-based coating has very little effect on the measured color; therefore, the printed ink density can be used for controlling the ink on press.
History
Editor
Habekost, M. (2017). M3 is for controlling metallics. Printing Industries of America, the Magazine, 9(1), 32-33.