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What the Tech: How to find ‘invisible ink’
AUGUSTA, Ga. (WRDW/WAGT) - When we were kids, “invisible ink” meant lemon juice on notebook paper, write the message, and to see it someone would have to hold it up to the light for the words to ...
Q: What's the secret to invisible inks? A: The essence is two reagents that produce a color, such as a colorless solution that chars with application of heat or darkens with addition of lemon juice or ...
ALBUQUERQUE, N.M. — A high-tech invisible ink invented at Sandia National Laboratories could become the newest tool for stopping counterfeit goods. The research team is now seeking partnerships to ...
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