1963 年 83 巻 4 号 p. 333-337
Critical relative humidity (CRH) of the mixture with three component system among which any reaction does not take place, can be calculated from the equation (4).
As to CRH of the mixture with two component system which produce double salt, either the equation (5) or (6) will be formed experimentally, not only in Fig. 2 but also in Fig. 3 and at least one CRH out of the two can be calculated from these equations.