High-quality, interference-optical anti-reflective glass, or glass for museums, has a firm place in the world of picture frames. It protects sensitive works on paper from dust, dirt, contact and harmful UV radiation. At the same time, it should allow the viewer as unclouded a view of the picture as possible. This means that it must reproduce colours undistorted and reduce reflections as best as possible.
Optical interference anti-reflection coating - What is it?
In short, optical interference coating means that the glass is coated with many thin layers of metal oxide, each of which reflects a different wavelength of light. The visible light waves are then reflected back in such a way that they cancel each other out. This reduces the otherwise distracting reflection in the glass by over 99%. The various layers are only 0.2 micrometers thick in total - a fraction of a human hair (about 500 micrometers).
Source: Tru Vue Inc.
Behind the Scenes:Tru Vue®
One of the world's largest manufacturers of museum glass, Tru Vue®, now offers an exclusive look at the intricate process of producing its high-quality Museum Glass® and Optium Museum Acrylic®. The Tru Vue® factory in Faribault, MN is state of the art and produces interference optical anti-reflective glass around the clock.
View into the magnetron sputter. Source: Tru Vue Inc.
In the 700ft long machine, (acrylic) glass is coated in a vacuum chamber by means of so-called magnetron sputtering. The metal atoms are atomized and applied evenly to the glass in several layers without damaging it. How this works and what it looks like in the manufacturer's high-tech factory can now be seen for yourself in a behind-the-scenes video:
You can find additional information about the various glasses for musuems in our knowledge section. We will also be happy to advise you personally on your frame and glass selection.