Abstract
It was found that the water-soluble polyvinyl alcohol (poval)film is available for the size measurement of water droplets about 10to 300μ in diameter. The relation between the diameters of droplets (d) and those of their traces on the film (D) was expressed by the following empirical equation D=4.54 d0.8, and the calibration curve was presented in Fig.4. It was found that the calibration curve could be extended to larger drops of about 4 mm in diameter.
The poval film is further available as a specimen supporter for the electron microscope. For example, the size of a trace of small droplets on the film can be measured with an electron microscope and besides some materials contained in a droplet can be identified by the electron diffraction method.
