抄録
The authors formerly reported that the boundary tensions among solid, lipuid and gas were the important factors next to the volatility of liquid for the characteristic temperature, at which vapor film breaks down, of quenching media in the cooling process. Later the differences of cooling ability among various liquids were often explained by the boundary tensions in their reports, but these explanations were not sufficient for the lack of definite data.
In this report, therefore, the views of the authors were complemented with appropriate data: that is, the difference of the characteristic temperature were explaind by the boundary tensions in such cases as aqueous solutions of NaCl, etc. (non-volatile solute), mineral oil containing some polar substances, and deteriorated oil. The difficulties to find suitable reagents which could improve the cooling ability of mineral oil were pointed out. In order to elevate the characteristic temperature the wettness is the important factcr next to the volatility of the liquid.
