This was a hodgpodge of images from the 60s, 70s, 80s and 90s actually, and the screen shots do show a melt being prepared, probably for a color emulsion coating. The emulsion is not yet added as they are in the light and the mixture is already white as if it were carrying a color dispersion. Very nice overview of the project.
The estar used was 2 mil (0.002") thick and was used for John Glenn's launch as well as on the moon. It was developed for NASA and the USAF in the late 50s for space use. A Kodak engineer from the project was shown in one of the quick cuts.
Thanks for the information.