The present invention relates to a water-based fluorescent ink for the purpose of measurement or judgment of the fluorescence emission in a visible light region by an excitation wavelength in a predetermined ultraviolet range, containing water, a coloring material dissolved or dispersed in water, and...http://www.google.es/patents/US7141105?utm_source=gb-gplus-sharePatente US7141105 - Water-based fluorescent ink, recorded image using the same, and judging method
Water-based fluorescent ink, recorded image using the same, and judging method
