DOUBLE-SIDE RECORDING DISK AND ITS FACE IDENTIFYING METHOD

PROBLEM TO BE SOLVED: To provide a double-side recording disk capable of being relatively and easily manufactured and easily identifying the front side and rear side. SOLUTION: The recording disk is provided with a recording layer where recording information is recorded on and a disk main body 23 composed of a pair of disks 22, 24 having a transparent substrate covering the recording layer, and a pair of disks 22, 24 are pasted so that those transparent substrates position in the front side of the disk main body 23. And the color of transparent substrates in the both sides of the disk main body 23 are mutually different. Also, the outer shapes of a pair of disks are mutually different, and the shapes of the outer peripheral surface of a pair of disks are mutually different. Further, the constitution of non-recording areas in both sides of the disk main body are mutually different.