<p>Glass generally consists of a mixture of quartz sand (60%), soda (19%), dolomite / lime (15%) and other substances (6%). Depending on the desired properties of the glass this mixture is changed. Triplex consists of three layers of glass and therefore is of a much higher quality than say Duplex glass. It starts with a crystal layer, followed by a opal layer and finishes again with a crystal layer. Through these three layers a better light distribution and light output is achieved. The first layer directs the light from the lamp in the whole vitreous body and thus ensures an optimal distribution. The opal layer in the middle ensures a soft and pleasant light output of the lamp.</p>