Discrimination mark

A discrimination mark capable of coping with both authentication by perceptual recognition imparted to a watermarked base member, and authentication by mechanical recognition comprising, applying a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof to thin portions of the watermarked base member.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of perforations provided in a base member and authentication by mechanical recognition comprising, applying βa substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof to the perforations of the base member as perforated.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of embossment and authentication by mechanical recognition comprising, applying a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof to depressed portions of the embossment.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of intaglio and authentication by mechanical recognition comprising intaglio applied by printing with an ink containing a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of a see-through register and authentication by mechanical recognition comprising a see-through register imparted by printing with an ink containing a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of a planchette, hologram, security threads, or fibers, and authentication by mechanical recognition comprising the planchette, hologram, security threads, or fibers are a planchette, hologram, security threads, or fibers, formed of material containing a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof.

A discrimination mark capable of coping with both authentication by perceptual recognition by the agency of a planchette, hologram, or security threads, and authentication by mechanical recognition comprising the planchette, hologram, or security threads, formed by applying material containing a substance obtained by controlling a content ratio of a stable isotope thereof at a value different from the natural abundance thereof to the surface of material higher in reflectivity than a base member.