METHODS FOR USING FLUORESCING YELLOW TONER PARTICLES

摘要

A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut on various printed receiver materials.

主权项

1. A method for providing an enhanced yellow toner image, the method comprising:
providing fluorescing yellow polymeric toner particles on a receiver material to provide a fluorescing yellow toner image, fixing the fluorescing yellow toner image to the receiver material to form a fixed fluorescing yellow toner image,
wherein each fluorescing yellow polymeric toner particle comprises a polymeric binder phase, and has distributed therein:one or more non-fluorescing yellow colorants having one or more absorbance peak wavelengths of at least 480 nm and up to and including 600 nm, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm,wherein the molar ratio of the one or more fluorescing yellow colorants to the one or more non-fluorescing yellow colorants is such that the covering power of the fluorescing yellow polymeric toner particle is greater than the covering power of non-fluorescing yellow polymeric toner particles having the same composition and size except that the one or more fluorescing yellow colorants are absent, andthe molar ratio of the one or more fluorescing yellow colorants to the one or more non-fluorescing yellow colorants is such that the L* value of the one or more non-fluorescing yellow colorants, when present in a non-fluorescing yellow polymeric toner particle comprising the same polymeric binder phase, is increased by at least 50% in the presence of the one or more fluorescing yellow colorants in the non-fluorescing yellow polymeric toner particle.