Paper is convenient in that it is extremely light and easily portable.
However, reusing paper usually requires the lengthy and costly process of recycling. Digital displays, such as an LCD screen, can be easily and instantly reused thousands of time, but the appliance itself is often bulky and awkward to carry around. Imbedded within the plastic are millions of tiny beads floating in oil-filled cavities. The beads contain two hemispheres of contrasting colors, such as black and white, each of which is either positively or negatively charged. When a voltage is applied to the Gyricon sheet, the floating beads rotate in response to the electrical charge, displaying either their black or white side.