According to the World Wildlife Fund, the world produces about one million tons of paper per day. This figure is steadily growing and the only thing that we can do is to use it less or recycle. However, the scientist of the University of California Yadong Yin invented a new kind of paper produced without harm to the environment.
Yadong Yin from the University of California at Riverside, his team of scientists created an unusual kind of paper that can be printed using ultraviolet light. And to erase what is written on the page, it is enough to heat it or just leave it for five days (during this period the typed characters will disappear).
To produce such an invention, scientists have combined a Prussian blue dye with titanium dioxide to produce nanoparticles that can be applied to paper as a coating. It is enough to shine with ultraviolet and titanium will give the paper a natural white colour. Taking into account the colour characteristics of mixed substances (blue dye and titanium), you can reproduce either white symbols on a blue background, or blue on white.
Such a paper can be reused up to 80 times! This will undoubtedly have a huge positive impact on the environment, theoretically reducing the possibility of consuming ordinary paper in the previous levels.
And although this is not the first type of reusable paper that was invented, the low cost of materials for its reproduction makes the innovation much more acceptable for a mass use. But the fact that the printed words disappear from the paper in five days can be a significant drawback, but in some cases, an advantage. If you use this paper for those notes and writings that will not be needed later, this can seriously reduce the amount of waste.
Moreover, the introduction of eco-paper will not only save trees, but also eliminate air pollution, improving the ecological situation as a whole. After all, part of the carbon dioxide emissions comes from paper production.
Unfortunately, the mass introduction of the novelty will take some time, because Yin and his team have not yet invented a printer that will be able to print on this type of paper. But after the process is completed, the documents of the new format will become a more worthy alternative for our current printing methods.