A found footage film that taps into the poetic tradition of the language cut-up, while taking filmic advantage of the 26-frame displacement between sound and image inherent to the optical soundtrack system of 16mm film. The magenta-shifted fragments of an educational film on "Reaching Your Reader" reveal their chemistry where the splicing tape ripped a "ruby skin" of the emulsion away from the base of the film, leaving a green tear at the edit points. Ruby Skin is a material homage to the disappearing medium and some of its idiosyncrasies.