| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to omit a label sticking stage, etc., by disposing first and second reflection film layers so as to face each other via an opaque layer consisting of an opaque material and printing a prescribed information on the inner peripheral parts of the other surfaces of first and second disk substrates. SOLUTION: The first reflection film layer 12 consisting of a high-reflection material, such as Al, is laminated on one surface 11A of the first disk substrate 11 consisting of a transparent resin material, such as, for example, polycarbonate. The second reflection film layer 14 consisting of the similar high-reflection material is laminated and formed on the one surface 13A of the second disk substrate 13 consisting of the similar transparent resin material. The first and second disk substrates 11, 13 and the opaque resin layer 15 are laminated and arranged so that the first and second reflection film layers 12, 14 face each other via the opaque resin layer 15. Reflection colors are selected for the colors of the ink of the respective printing layers 20A, 20B with respect to the color of the opaque layer 15. Thereby, the characters, etc., of the respective printing colors 20A, 20B of the optical disk 10 are made more distinctly visible with the opaque resin layer 15 as the background so that the printing contents of the printing layers 20A, 20B are made more easily readable for users. |
