What you refer to is colour photography by means of taking colour seperations in succession. This is a process going back to the beginning of colour photography and was a important process back then. Look for the work of Adolf Miethe.
That's what I was thinking, but I wonder, might the color filter layers in the film influence the result in some way?
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.