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How 'disappearing ink' can cut waste paper

I guess that it's a bit similar to the "read this and then eat it" scenario

Scientists have unveiled a new kind of 'ink' that disappears from a page 24 hours after printing, allowing paper to be re-used

Monday 15 October, 2007 11:02 AM

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"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible" - Freeman Dyson