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Wednesday, 18 September 2019
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Raw materials & technologies, Raw materials, Coatings pigments

Pigments glowing in the dark

Thursday, 27 August 2009

The new technology can produce long-lasting glow in any colour.

The glow-in-the-dark pigments emit light in any colour of the visible spectrum for nearly a day. Source: University of Georgia

The glow-in-the-dark pigments emit light in any colour of the visible spectrum for nearly a day. Source: University of Georgia

Phosphorescence is a process in which energy absorbed by a substance is released relatively slowly in the form of light. Some materials release energy over long periods of time and are known as long-persistence phosphors. By exploiting the phenomenon of energy transfer, the new technology can produce long-lasting glow in any colour, including blue, green or red, and in tints and hues, such as pink, without extensive modification to the composition of the materials. The University of Georgia Research Foundation Inc. and the University of Puerto Rico have granted an international, nonexclusive license for a portfolio of glow-in-the-dark pigments that can be designed to emit light in any colour of the visible spectrum for nearly a day. Performance Indicator LLC, of Lowell, MA, has acquired the license. The seven phosphors included in this patent portfolio are simple to manufacture and environmentally safe. They do not contain sulfur, radioactive materials or lead. They can be used in a multitude of consumer and industrial applications. The license allows the owner to adapt, patent and market colour-change or indicator technologies for a variety of industrial and consumer applications, and to import, manufacture and sell the phosphors. Also licensed under the same agreement are methods to customize the wavelength of emitted light, white-emitting phosphors, methods to render hues and tints to emitted light, and methods to blend such phosphors with other materials, such as polymers and resins.

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