Inkjet ink and tablet printed matter

Abstract

This invention aims to provide an inkjet ink capable of sufficiently suppressing the photodiscoloration and/or photofading of printed images and maintaining the lightfastness not only when the inkjet ink is stored and used in a low humidity environment (about 20% RH) but when the inkjet ink is stored and used in a normal humidity environment (about 50% RH), and a tablet (tablet printed matter) including printed parts printed with the inkjet ink. An inkjet ink according to this embodiment contains: Blue No. 1 as a food dye in the range of 0.1 mass % or more and 2.5 mass % or less based on the total mass of the inkjet ink; and reduced isomaltulose as a fixing agent in the range of 5.7 times or more and 16.2 times or less the mass of the Blue No. 1.

Dependencies are inferred from the claim text.