Frames can be made to hold the lenses in several different ways. There are three common styles: full frame, half frame, and frameless. Full frame glasses have the frame go all around the lenses. Half frames go around only half the lens; typically the frames attach to the top of the lenses and on the side near the top.
Ethanol is a monohydric primary alcohol. It melts at - 117.3Â°C and boils at 78.5Â°C. It is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.t is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.
Ethanol has the chemical formula CH 3 CH 2 OH and is often simply called 'alcohol' by the general public. However, the term alcohol actually refers to a whole family of organic chemicals of which ethanol is only one member.istorically, ethanol has been used as a fuel-you may even have once had a chemistry set with a methylated spirit or alcohol burner in it to act as a heating source. Ethanol has a combustion value of 26.8MJ/kg, which is better than that of wood but less than that of petrol.