Have you ever thought about how the beautiful colors on butterfly wings are produced? Where does the metallic luster on the back of beetles come from? The secret is that the light is on the surface of their bodies
The tiny gaps reflect and produce color, which is called "structural coloring". Following the footsteps of nature, researchers at Kyoto University in Japan have developed a method that can produce full-color, fade resistant images without the need for ink.
To achieve this effect, materials science professor Vosa Silvania and his colleagues from the Institute of Comprehensive Cell Materials Science at the university created tiny cavities on the plastic film used in the bottle and placed them in an acid solution. The light interruption caused by an accidentally flat surface leads to structural coloring, which is very similar to the phenomenon in nature.
The team stated that this study may lead to the development of low-cost printing technology, as it does not require pigments and the materials and reagents involved are cheaper than traditional methods that rely on pigments. Researchers have confirmed that this method can generate colors throughout the entire visible spectrum, and the shape and size of the image can be adjusted.
Researcher Masatai Ito from the Institute of Comprehensive Cell Materials Science at the university pointed out that it can be applied to anti-counterfeiting technology for paper currency. The details of this research project were published in the online edition of the British scientific journal Nature on June 20th.
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