“Pilkington Activ” glass needs little cleaning, reducing consumption
of detergent and water.
The active glass has a special nano-scale (extremely thin) coating of microcrystalline titanium oxide which reacts to daylight. The reaction breaks down dirt on the glass, and when the water hits the glass
the dirt slides off.
The chemical used — titanium dioxide is a fairly benign compound found in toothpaste and paint.
The glass is slightly more expensive that conventional glass, adding about
15-20% to the cost of installation. However, it also provides an approximate
20 percent reduction in ultraviolet light transmission over clear glass and equivalent energy efficiency.
- Dirt, glass, Nano-scale Activ coating
containing microcrystalline titanium dioxide
- Sun shines on window.
The UV rays trigger a chemical reaction in Activ coating,
called a photocatalytic process, which breaks down dirt
water hits glass, a hydrophilic effect is created. Water spreads
evenly over the surface, instead of droplets, so runs off and
takes dirt with it