The glass Matt Etched called Madras Nebula, is a single or monolithic glass, translucent type, ie, that lets clearly unable to see clearly through it. It is a glass, with a special chemical process is achieved lower few microns thickness thereof, providing roughness to one of its two faces. It looks like ice, which is widely used today in many applications with glass. The characteristic of this glass drawing are achieved by a built-in time of mold matting. It is somewhat more expensive than the standard etched glass, due to manufacturing costs. This glass is 4 mm thick and has a weight of 10 kg per square meter. However you can use different thicknesses to suit the client, since the treatment is perfectly applicable thereafter. It is advisable to install this type of glass walls facing the outside since it has a high thermal transmittance close to 90 %, ie, is inefficient. This is recommended to prepare glasses camera or Guardian Sun, with this type of glass or other, to multiply up to four efficiency. It is not recommended to shut out the noise, since its thickness of 4 mm just reduce 29 decibels, which incorporated an acoustic glass could reach 45 decibels without problems. In case of preparing a glass chamber with this glass type, will include etching inwardly thereof, so as to have two flat faces on its exterior for ease of cleaning.