Patent ID: 9067436
Filing Date: 2015-06-30
Classification: B41J

Abstract:
1. A method comprising: determining an absorptivity spectra value for one or more ultraviolet inks at a time before curing; causing, at least in part, the one or more ultraviolet inks to be applied to a substrate to form an image; causing, at least in part, the image to be exposed to ultraviolet (UV) light produced by one or more ultraviolet light sources to cause, at least in part, the one or more ultraviolet inks to be cured to form a cured image; determining an absorptivity spectra value of the cured image; causing, at least in part, the absorptivity value of the one or more ultraviolet inks before curing to be compared to the absorptivity spectra value of the cured image to determine an absorptivity spectral shift; determining a reflectance value of the cured image, wherein the reflectance value is based, at least in part, on the absorptivity spectral shift; determining a degree of cure of the cured image based, at least in part, on the reflectance value; and controlling the degree of cure of any subsequent image formed on the substrate by a printing system by causing the one or more ultraviolet light sources to vary one or more wavelength of the UV light, intensity of the UV light, or causing the printing system to vary the exposure time to which the uncured image is exposed to the UV light produced by the one or more ultraviolet light sources to form the cured image.