INK, PRINTED PRODUCT AND ITS PREPARATION PROCESS

PROBLEM TO BE SOLVED: To provide an ink, etc., having a practical fastness which may form a reflective structure wherein reflective points of different colors are spotted on a printing surface. SOLUTION: This ink is prepared by mixing a spectral reflective flake with a thickness of 7 to 20 μm and a surface area of 2,000 to 15,000 μm2 which has spectral diffraction gratings embossed on its surface and also a reflective coating, with a crosslinkable resin ink vehicle. The spectral reflective flake used here is obtained e.g. by subjecting a PET film to a hologram treatment through embossing (>=44,000 lines/inch), preparing a hologram film by forming a reflective coating through aluminum deposition, etc., and cutting this film. Here, the crosslinkable resin ink vehicle is used to surely fix the flakes onto the printing surface with a high fastness.