I just saw a old fax printout and realized that the ink on those fade away with time, most would consider this an annoying glitch. But think from a different perspective. Why not use it for our advantage?
In almost all settings today (office or home) people print things out to use only for a very short period of time (maybe a week) just so they don't have to stare at the computer monitor for long periods of time. If Fading Ink is used, you could simply print it out, use it for the short duration and after a few days the ink will slowly start fading away.
So I call on all your crazy chemists, know of anything that we can use as a ink that with time will start changing colors or simply fade away to transparency (either by a chemical reaction taking time, or simply a reaction with gases in the environment). Even if it changes to a color such cream or light blue, that would be ok... (we can just print on a light blue piece of paper and continue to reuse that).
Of course other than the tree/paper saving advantage, you can do some really nifty tricks with this. You could print a message out using a ink that fades away due to oxidization, and immediately after printing put it in a sealed envelope and send it. This way the recipient only have a short amount of time to read it and the message will effectively self destruct (unless they know what's coming and quickly make a copy of it, of add some more chemicals to change the color of the ink yet again).
Simple enough?
In almost all settings today (office or home) people print things out to use only for a very short period of time (maybe a week) just so they don't have to stare at the computer monitor for long periods of time. If Fading Ink is used, you could simply print it out, use it for the short duration and after a few days the ink will slowly start fading away.
So I call on all your crazy chemists, know of anything that we can use as a ink that with time will start changing colors or simply fade away to transparency (either by a chemical reaction taking time, or simply a reaction with gases in the environment). Even if it changes to a color such cream or light blue, that would be ok... (we can just print on a light blue piece of paper and continue to reuse that).
Of course other than the tree/paper saving advantage, you can do some really nifty tricks with this. You could print a message out using a ink that fades away due to oxidization, and immediately after printing put it in a sealed envelope and send it. This way the recipient only have a short amount of time to read it and the message will effectively self destruct (unless they know what's coming and quickly make a copy of it, of add some more chemicals to change the color of the ink yet again).
Simple enough?