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Quality controls and security features for U.S. currency and postage stamps

The US Bureau of Engraving and Printing produces over 9 billion Federal Reserve notes per year. Each note must maintain unfirm consistency for both security features and print quality. The quality control process necessary to assure the uniform nature of US currency requires a significant multi-tiered approach. Based on innovative optoelectronic techniques, individual security features are examined as a critical element during each phase of the production process. Print quality standards must also be strictly maintained and monitored to assure the uniformity of the most popular printed item in the world. This presentation describes the approach and some of the techniques developed and implemented in-house to carry out the necessary monitoring and control.