Printed matter, printed matter inspection device, manufacturing method of printed matter, and manufacturing device of printed matter

A printed matter, comprising:

• a base material which reflects light of an infrared wave length band;
• a main image which is printed on the base material with a first ink;
• a first sub image embedded in the main image which has the same color as a color of the main image in a human visual sense, and is printed with a second ink to absorb light of the infrared wavelength band by a first absorption coefficient;
• and
• a second sub image embedded in the main image which has the same color as the color of the main image in a human visual sense, and is printed with a third ink to absorb light of the infrared wavelength band by a second absorption coefficient;
• wherein the first ink is a visible ink which transmits light of the infrared wavelength band, and the visible ink includes a cyan ink, a magenta ink and a yellow ink each transmits light of the infrared wavelength band, which are printed in a superimposed manner,
• wherein the second ink includes a fluorescent ink which absorbs light of the infrared wavelength band by a predetermined absorption coefficient and the visible ink, the fluorescent ink and the visible ink are printed in a superimposed manner, and
• wherein the third ink is a black ink containing carbon to absorb light of the infrared wavelength band by the second absorption coefficient.