Canadian Researchers Develop Permanent Anti-Fog Coating 146
cylonlover writes "Tired of your glasses fogging up on cold days, or of having to spit in your dive mask before putting it on? Those hassles may become a thing of the past, as researchers from Quebec City's Université Laval have developed what they claim is the world's first permanent anti-fog coating. Just one application is said to work indefinitely on eyeglasses, windshields, camera lenses, or any other transparent glass or plastic surface."
Re:Uhm... (Score:5, Informative)
From TFA:
The actual anti-fog coating itself is composed of polyvinyl alcohol, which is a hydrophilic compound that causes the individual droplets of condensation to disperse
Unless I'm waaaay off, I think they mean hydrophobic, as in "it doesn not bond with water".
Um, you are, indeed, way off.
A hydrophobic coating would cause condensation to coalesce into droplets minimizing contact area between the condensate and the surface. In other words, it would fog the surface: due to refraction and internal reflection, small water droplets in air are essentially opaque while large droplets act as distorting lenses.
A hydrophilic coating, on the other hand, causes the condensation to form a continuous film maximizing contact between the condensate and the surface. This would remain transparent and would not greatly distort images viewed through it unless the amount of condensate was very large.
Problem is dirt (Score:5, Informative)
Re:Problem is dirt (Score:5, Informative)
1/4 cup vinegar, 1/2 teaspoon liquid soap or detergent, and 2 cups of water in a spray bottle.
Spray on window, and rub vigorously with terry cloth. Works wonders.
Re:Problem is dirt (Score:5, Informative)
Re:sure... (Score:4, Informative)
http://www.zennioptical.com/ [zennioptical.com]
I get decent quality stuff on the midgrade lenses for the price the optometrist pays.. whenever I get a new set of glasses, I order 3 more sets from this place.
Nothing like having 2 sets of spares and one set of "grunge glasses" to use when getting sweaty or really dirty to keep the expensive nice ones looking new.