Hi again #believeinfilm ,
Redscaling film is one of the easiest tricks in photography and one of the first ones I tried/wrote about. But it's been a minute, so I re-wrote it completely:
The Redscale Film Guide
https://www.analog.cafe/r/the-redscale-film-guide-jdmc
The guide explains what redscale film is, how to do it at home/with which films, and why it works. It also explains how to get colours other than red.