Patent ID: 8702220
Filing Date: 2014-04-22
Classification: B01D,B41J,C09D

Abstract:
1. An ink set with near infrared detection capability comprising: a cyan ink including a cyan colorant, a magenta ink including a magenta colorant, and a yellow ink including a yellow colorant, each of the colorants having maximum light absorbance in the visible wavelength range of about 400 to 750 nm, in which each of the cyan, magenta and yellow inks comprises a near infrared (NIR) absorbing pigment, which is different in spectral absorption characteristic from each of the colorants and absorbs light in the wavelength range of about 750 to 1200 nm; and in which application of light from an LED device provides for the detection of the near infrared (NIR) absorbing pigment by the detection of a decrease in emitted LED intensity.