Photographic Chemistry: "The Alchemist In Hollywood" 1940 American Chemical Society
Support this channel: https://paypal.me/jeffquitney OR https://www.patreon.com/jeffquitney more at http://quickfound.net/ Explains photographic film processing chemistry with reference to cinematography. Originally a public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.