The technique seems to have been discovered accidentally. Some people shooting large format color film would load the individual negatives backwards. This phenomenon is likely as old as color film itself. Lomography Redscale was the first purpose-made redscale film, which was available since at least 2010. Today, Lomography Redscale film is available in 35mm, 120, and 110 formats.1
The technique is considered by some to be part of the lo-fi photography movement, along with use of toy cameras, pinhole cameras, instant cameras, and sprocket hole photography.
"Lomography All Film". Lomography Shop. 2023-06-11. Retrieved 2023-06-11. https://shop.lomography.com/us/film/all ↩