TimesOnline: Scientists have unveiled a new kind of 'ink' that disappears from a page 24 hours after printing, allowing paper to be re-used.Mission Impossible-style self-destructing messages may soon cross from the realm of fiction into the wilds of the nine-to-five office, according to scientists who have developed printer ink that vanishes after 24 hours.
When a document is printed on the reusable paper, the text initially appears similar to normal printed text – only in a shade of dark purple, rather than black.
Eight hours later, however, the image is a shadow of its former self and after a day – much like the McFly family photograph in Back to the Future – it is gone completely.
The blank page can then be put back in the printer.Read On
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7 comments:
Cool ... reminds me of those interesting prang items you get .... spill a bottle of ink on ur friend's dress ... and it gets disappeared in an hour :D
**pranks
the trees take a sigh of relief!
Take a lemon. Cut in half. Dip a pointy thing(fountain pen?) in it. Pick a blank piece of paper. Write "I'm so 1337". Bring the paper near fire, don't burn it. Viola! I'm so 1337 :)
Used to do this in class 2 or 3. Good for secret messages.
o yes..i know abt the lemon ink thing..there's an invisible pen in the mkt too now.
That invisible pen is a ripoff with lemons aplenty around your kitchen.
it's cool..u can keep the pen..ur friend can keep the mini torch..and u can have ur secret messaging going..
fun for kids.
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