Patent ID: 7364613
Filing Date: 2008-04-29
Classification: C09D

Abstract:
1. A fluorescent water base ink for ink-jet recording comprising: water; a first fluorescent dye; and a second fluorescent dye, wherein: the first fluorescent dye is a color fluorescent dye which absorbs light in a first absorption wavelength region in an ultraviolet region to emit fluorescence and which absorbs light in a second absorption wavelength region to emit no fluorescence; the second fluorescent dye is a fluorescent dye which absorbs light in an absorption wavelength region in the ultraviolet region to emit fluorescence, the absorption wavelength region in the ultraviolet region being different from the first absorption wavelength region of the first fluorescent dye, a wavelength region of the fluorescence of the second fluorescent dye being not overlapped with the first absorption wavelength region of the first fluorescent dye, and at least a part of the wavelength region of the fluorescence of the second fluorescent dye being overlapped with the second absorption wavelength region; and the first fluorescent dye is selected from the group consisting of C.I. Basic Red 2, C.I. Basic Red 9, C.I. Basic Red 12, C.I. Basic Red 13, C.I. Basic Red 14, C.I. Basic Red 17, C.I. Basic Violet 1, C.I. Basic Violet 3, C.I. Basic Violet 7, C.I. Basic Violet 10, and C.I. Basic Violet 14.