抄録
Glass is widely used in industrial fields, and is essential to modern life. The piece of broken glass would be dangerous if they hit a human body, e.g. the eyes. There is a reasonable way to make a glass safer-to install a layer of glass film onto it. In order to examine the performance of the film, a falling ball test was conducted. The method is to drop a steel ball from certain height onto a fixed glass and then to observe the broken glass with and without films. But the strength of the glass still has not been quantified. A falling ball test was done according to JIS R 3212, and the results of the strain measurements with the film were more strength than that without film.
