My grandmother, Helen I Byers, was an avid collector & crafter. I was entrusted with her collections and craft materials & tools. While looking through my own stash of ribbon I found a box of her (now) vintage rayon yarn-acetate film ribbon. She had a large collection of ribbon for every holiday and every occasion. I use to look at them just for the love of studying the bright shiny colors. This box of ribbon was always special to me. Light would reflect off of these magical satiny bundles of color like no other ribbon I had ever seen. The visible fibers are soft to the touch and the shiny back made bow making easy.
I have tried to find the companies that produced these ribbons. I have only been able to find a few people selling spools of the "Facil Fab" - "Satin-Glo" ribbon. If anyone knows more about this ribbon, the manufactures and dates, please let me know. I know that they would have to be after WWII with the advent of synthetic materials. My guess would be 1950's.