Raja Bala

Xerox, Rochester, N.Y., offers digital printers an easy method for creating personalized fluorescent marks on documents, such as licenses and checks, using the same equipment found in most print shops. The innovative security printing method uses a special combination of toners to create the secure imprint. Prints from a four-color printer selectively expose the fluorescent properties found within white paper, making it possible to embed personalized printing, hidden security marks and codes that are only visible when exposed to ultraviolet light. “What amazes people is we can create fluorescent writing on a digital printer without using fluorescent ink,” said Reiner Eschbach, a research

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