The Xerox technology is called Gyricon.It's composed of a silicon rubber compound with the thickness and flexilility of poster board.The Gyricon sheets have thousands of plastic balls suspended in oil.Each ball is black on one side and white on the other and together they act as pixels to display images.Images can be updated much the same way as with a monitor.The beads are embedded in a large sheet, with each microcapsule suspended in oil to allow the beads to rotate in their orbits, says Robert Sprague, manager of the document hardware lab and electronic paper projects at Xerox's Palo Alto Research Center.The paper could be powered by a matrix of transistors, such as those in laptop computer screens.Gyricon uses reflective light, like real paper, so it would use less electricity.
A Gyricon book will eventually be connected with a wireless device that will enable a reader to download content from the Internet.
Xerox will also make the Gyricon interactive, so a user could write on it and reuse it.
（美国） 麻省坎布里奇市的E Ink公司是开发电子墨水和“纸”的先导，这种墨水和纸将替代今天我们所知道的报纸与书籍。
利用电子墨水和双向无线通信有可能导致产生电子书籍 （当读者看完当前的书本时，可以选择新书刷新） 或者产生能边读边用最新消息自我更新的报纸。
由E Ink公司发明的电子墨水是一种透明的液体塑料，里面有微型封装块，封装块内含有在蓝色染料中的白色小片。微型封装块悬浮在像食用油那样 的物质中。白色小片带负电荷，因而它们能对电刺激作出反应。
据E Ink公司的副总裁兼总经理Russell Wilcox称，这种墨水可以涂在任何表面，从墙到计算机屏幕。然而，书写面看上去很像极薄的便携机显示屏， 在正面有一透明的表面，在背面有线路。