W-INK (IMAGE)
Caption
(A) In this W-INK prototype, the chip appears blank in the air. When dipped in varying concentrations of ethanol, however, it reveals new markings. (B) Because all liquids exhibit a surface tension, this indicator has the potential to be used to differentiate between liquids of any type.
Credit
Courtesy of Ian Burgess.
Usage Restrictions
Image courtesy of Ian Burgess.
License
Licensed content