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The article discusses the importance of ink technology to printed electronics. The author states that disposable-battery testers added into the product or packaging is considered one of the first widely used printed-electronics applications. These low-cost, interactive testers depend on conductive inks to form a resistive-heating and temperature-responsive inks to provide the display. Electronic paper is another display technology that benefits from printed electronics. Electronic paper has the capacity to reflect light like ordinary paper.

Discusses why the advent of electronic displays has not resulted in the paperless office. Evolution of computer displays; Analogy of paper to clay tablets; Difficulty of migrating data from older to newer storage technologies. INSET: IT'S ABOUT POWER.

A personal narrative is presented which relates the author's experience of working with servo controls for winding rolls of paper, 20 feet in width, from pulp to paper and processing, with emphasis on a no-contact tension-control system with an ultrasonic-transceiver circuit.

Features an engineering sample display of electronic-paper with a display of 160 pixel per inch developed by Philips Corp. and E Ink Corp. Resolution of the electronic paper; Incorporation of electronic ink technology in the paper; Response of particles in electronic ink to an electric field.