Glycerin, due its various properties, has found many uses in the film industry-
i) Glycerin helps to rejuvenate damaged skin. It helps soften and remove hard dead skin cells on hands and feet. Film world, often uses this to ensure flawless skin.
ii) Also, glycerin has this particular property of making us teary, when put in eyes.
In movies and the acting industry, glycerin is very important due to this property of its.
It's used for scenes involving tears and crying.