An instrument used in the USSR consists of a light source directed at the glass surface. The reflected light is measured by means of an AgS photoelectric cell. The intensity of the reflected light diminishes if deep cuts or holes are present in the glass surface, Control limits can therefore be set.
Origin
Unknown
Journal Title
(Silikat Tech. 1960, 11 (1), 31)
Sector
Primary Papers
Class
PP 330