Scientists invent new technology to print invisible messages

Messages can only be seen under UV light and can be erased using a hairdryerForget lemon juice and hot irons, there is a new way to write and read invisible messages – and it can be used again and again.The approach, developed by researchers in China, involves using water to print messages on paper coated with manganese-containing chemicals. The message, invisible to the naked eye, can be read by shining UV light on the paper.Continue reading...
Source: Guardian Unlimited Science - Category: Science Authors: Tags: Science Data and computer security Privacy China Technology World news Source Type: news