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 and Isopropyl alcohol are both members of the alcohol family and have similar disinfectant properties. Ethanol is the type of alcohol present in alcoholic beverages. Isopropyl alcohol is also known as Isopropanol, 2-propanol or rubbing alcohol. When used as disinfectants, both are typically at a concentration of 70 percent in water. Ethanol, also known as pure grain alcohol, ethyl alcohol or drinking alcohol, is one of the most widely used recreational substances.