I made a Kodak Ultramax 400 ASA colour film into redscale last summer. I exposed it at 25 to 100 ASA. These are some of the photos. Visit my Etsy shop for cameras and related stuff, the facebook group on modding lenses and cameras or my Instagram accounts ourbooksmalmo or flashknappen .
THE EXPERIENCE MIGHT BE BETTER THAN THE RESULTING PHOTOGRAPHS ourbooksmalmo@gmail.com