The removal of one or more components from a mixed system. Usually the components being removed are impurities or are considered less valuable than the material from which they are stripped. Examples of stripping operations are (1) the removal of overburden from a deposit of coal or ore, (2) the removal of color from a dyed fabric using a reactive agent, (3) the removal of an organic or a metallic coating from a solid surface, (4) the removal of a dissolved component from a liquid by extraction using a second liquid which is insoluble in the first, and (5) the removal of a volatile component from a liquid by vaporization. Only stripping by vaporization will be covered here.