Patent ID: 7943228

Claim:
A printing medium comprising: a rectangular lens sheet that has a surface formed in a predetermined lens shape; and a thin base that is fixed to a rear surface of the lens sheet on which no lens is formed and has an extending portion extending from one side of the lens sheet to the outside, wherein, the extending portion includes a plurality of unit regions adjacent to one another with adjacent portions, which are common sides, interposed therebetween, where each unit region of the plurality of unit regions comprises a region of the extending portion having approximately a same size and shape as the rear surface of the lens sheet, a first printing surface and a second printing surface are formed in corresponding unit regions on one surface of the base that is fixed to the rear surface of the lens sheet or the other surface of the base, and at least one unit region is additionally interposed between the unit region where the first printing surface is formed and the unit region where the second printing surface is formed, such that when the printing medium is folded, the second printing surface is folded and affixed to the at least one unit region and then folded again so as to be disposed below the first printing surface and the rectangular lens sheet in a stacked manner.