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Appendix A: Conclusions and Recommendations From Previous National Materials Advisory Board Reports on Counterfeit Deterrence
Pages 101-104

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From page 101...
... 2. A broadening of the counterfeiting base made possible by the availability of commercial reprographic equipment can pose an intractable enforcement problem and cause serious erosion of confidence in United States currency.
From page 102...
... 5. In the longer term, the following deterrents are also candidates for adoption if the present difficulties can be overcome by research: holograms, optically variable ink, diffraction gratings, multilayer paper, and other mortifications of the substrate material.
From page 103...
... 4. The following deterrents are recommended for further development because they have characteristics compatible with use in currency and, in principle, can produce gross differences, easily recognizable by an untrained observer, between genuine and reprographically attempted counterfeit currency: - Most effective are security threads, watermarks, and volume-related substrate modifications.
From page 104...
... National Materials Advisory Board. Washington, D.C.: National Academy Press.


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