Coating Terms

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“Evaporation number” is defined as the ratio of time spent to completely evaporate a certain amount of solvent at 20°C temperature and 65% relative humidity, to the time spent to completely evaporate the same amount of reference solvent under same conditions. Diethyl ether is widely used as the reference solvent in Europe. In America and Far East, the most widely used reference solvent is n-butyl acetate.