(Gadgets) Ink toner cartridges are expensive, wasteful, and energy-intensive. That’s why Xerox’s new ColorQube 9200 printers are so innovative. Instead of using traditional cartridges, the printers use solid blocks of ink that melt when heated. Xerox claims that its $23,500 machine–meant squarely for corporate customers
(General Sciences) Using cheap materials that anyone can order by mail, scientists built several color-changing electronic displays on sheets of ordinary paper. It relies upon thermochromic ink, the same stuff that can be found in mood rings and disposable thermometers. When its temperature changes, so does its color.
Which I must say, is not always the case after fighting. ,