Spies delight! Scientists make INVISIBLE ink that is visible under UV light and is erased with a hairdryer
- System prints on a message or image on the manganese coated paper
- It can be printed with a normal water-based inkjet device and a computer
- It is only visible under 254 nm UV light that is invisible to humans
- If it is heated by a hairdryer for 15 seconds, the message is deleted and can be used again
Chinese scientists have created an invisible ink that would be ideal for keeping valuable information out of unwanted hands.
The water-based system can be printed in seconds and disappears after a short spell under a hairdryer after it has been read under ultraviolet light.
A message is printed by a water jet printer on paper coated in a manganese layer and is invisible to the naked eye, but can be revealed under 254 nm UV light.
Chinese scientists have made an invisible ink that would be ideal for keeping valuable information out of unwanted hands and everything can be printed on the paper (photo)
& # 39; Information security is a subject of great concern to people, especially in the economic and military fields, & # 39 ;, says Nanjing University senior author Qiang Zhao.
& # 39; Therefore, the main purpose of our work is to provide a safe and practical solution. & # 39;
Document security is of the utmost importance for governments and companies around the world and a simple invisible ink can be useful.
Researchers also state that it is environmentally friendly, with one sheet of paper that can be reused about 30 times.
The water-based system can be printed in seconds and disappears after a short spell under a hairdryer after it has been read under ultraviolet light (photo)
Researchers also state that it is environmentally friendly, with one sheet of paper that can be reused about 30 times after it has been deleted (photo)
& # 39; The rewritable function reduces costs considerably. The cost per print is estimated at RMB0.014 ($ 0.002) & # 39; Zhao.
& # 39; Most fluorescent security inks on the market that are used to record confidential information are environmentally harmful and cannot be deleted. The paper is only a disposable recording medium. & # 39;
The researchers now want to refine and improve the method.
& # 39; Our job is to provide a practical printing method. That is why we must ensure that it is non-toxic or causes little damage to the human body & # 39 ;, says Dr. Zhao.
& # 39; That is why we use manganese complexes that are environmentally friendly and low in toxicity. & # 39;
The research was published in the journal Cell.
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