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Recently, ITMO University in St.
Petersburg, Russia has developed an ink based on a colorless titanium dioxide colloid, which can be used on a variety of different surfaces
.
The ink can only show color after printing is completed, and by changing the way of nanostructure, it will produce different colors
.
Ink is an important material for printing
.
However, most inks, especially color inks, are more or less toxic
.
This will undoubtedly affect people's health or other aspects
.
And now, the emergence of this new type of ink will change the existing printing form, even if the ink or similar items become safer
.
In addition, this process will also be used in the production of some cutting-edge equipment
.
The research paper has been published in the recent "ACSNano" magazine
.