Stories
Slash Boxes
Comments

SoylentNews is people

posted by janrinok on Sunday February 05 2017, @10:26PM   Printer-friendly
from the solution-looking-for-a-problem dept.

Yadong Yin [...] and his colleagues at the University of California at Riverside have invented a type of paper that can be printed on using just light, erased by heating, and reused up to 80 times.

Yin created nanoparticles, which are a million times smaller than the thickness of human hair, with the dye Prussian blue, or its chemical analogues, and titanium oxide, which is commonly used in white wall paint. This mixture is then applied to normal paper.

When the coating is exposed to ultraviolet light, electrons from titanium oxide move to the dye in the nanoparticle. This addition of electrons makes the blue dye turn white. Focusing the ultraviolet light into shapes, you can print white words on a blue background—or blue words on a white background, which are easier to read.

If left alone, the paper reverts to its original state in five days. That process can be accelerated by heating the paper to 120 °C (250 °F) for 10 minutes.


Original Submission

 
This discussion has been archived. No new comments can be posted.
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
  • (Score: 2) by wonkey_monkey on Sunday February 05 2017, @11:52PM

    by wonkey_monkey (279) on Sunday February 05 2017, @11:52PM (#463224) Homepage

    Ugh, never mind. It's because the stupid page is trying to be clever and fade in the real images, or something, but uBlock stops it from loading its crappy javascript.

    --
    systemd is Roko's Basilisk
    Starting Score:    1  point
    Karma-Bonus Modifier   +1  

    Total Score:   2