The oldest A&B rolls I’ve seen are from sometime in 1939-40 from Calvin Company in Kansas City. I think if one looks in SMPTE they may find an article about this technique in 1937-38.
Rick Rick Prelinger Prelinger Library & Archives, San Francisco www.prelinger.com www.prelingerlibrary.org [email protected] Emerit Professor, Film + Digital Media UC Santa Cruz [email protected] -- Frameworks mailing list [email protected] https://mail.film-gallery.org/mailman/listinfo/frameworks_film-gallery.org
