A high-tech 'invisible ink' device to hide sensitive information - including emails - has been developed by scientists. The handheld machine uses chemicals available from grocery stores and pharmacies ...

Chinese scientists have created an invisible ink to keep precious information out of unwanted hands. The water-based system can be printed in seconds and, after it has been read under ultraviolet ...

Scientists have developed fluorescent bacteria that encode secret messages, creating a living invisible ink. Simple messages can be encoded by genetically engineering bacteria to produce fluorescent ...

Step 1: Put on your rubber gloves and lab coat (or old clothes) because turmeric can stain clothes and cover table tops with cardboard. Step 2: In a bowl, mix a tablespoon of bicarbonate of soda with ...