| abstract |
A stamper on the surface of which anodized alumina is formed and a production method thereof that does not generate a macro concave and convex structure and undulation of colors on a transcriptional surface are provided. Furthermore, a production method of a compact which does not have a macro concave and convex structure, and undulation of colors on a transcriptional surface with use of the stamper are also provided. A stamper on the surface of which anodized alumina is characterized by an average crystal grain size of the aluminum prototype having a micro concave and convex structure on the surface, the arithmetic mean surface roughness of which is equal to or less than Ra 0. 0Siam, and the purity of the aluminum is equal to or more than 99. 5%, and the size of which is equal to or less than 1mm. A suitable compact which does not have a macro concave and convex structure and undulation of colors on a transcriptional surface can be produced as an antireflective product with use of the stamper. |