Design coatings – a game with colours and performances

The color and performance of glass in buildings are important design elements. Project specific designed coatings can merge the visual intent of architects and building owners with the energy performance requirements of a building. Choosing glass colors from a catalogue with a limited range of options is a thing of the past with custom designed coatings.

Improving the building occupants’ comfort whilst enhancing the building performance is possible by using coatings with a variable gradient. A new coating technology offers not only the ability to customize the performance and color of glass so that it interacts with the rest of the building and its environment, but also that a single IGU can be designed as a graded/blended coating. For example, the visible light transmittance in the upper area of the glass unit is high to maximize visible light for comfort, and is then gradually lowered towards the bottom of the unit to reduce heat gain and glare while maintaining an unobstructed view.

When developing a new Low-E coating, one must determine the key targets such as but not limited to L*, a*, b* values (color spectrum), Solar heat gain, visible light and reflection. The presentation focuses on how individual colors perform regarding the Visible Light Transmission, Solar Heat Gain and Reflection. This presentation is a summary of available and upcoming coating technologies for the glass application rather than a scientific analysis of coating technology.

Stefan Goebel

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