Picture engraving method and engraved picture bearing certificate

摘要

The engraved picture bearing certificate (10) comprising a specular-surfaced engraving sheet (10a) on which an engraved picture (16) of an original picture (15) for identification, such as the photograph of face, a fingerprint, a signature, a logo or the like, is engraved by a graving tool (9) of an engraving device. The specularly reflected light from the surface (12) of the engraving sheet (10a) is visibly recognized as the engraved picture (16).