ocr: INSTANT PHOTOGRAPHY ROLLERS - / / A - - - - - - - - - - - - - F - - - a à ur à - CHEMICAL LAYERS REAGENT POD Instant photography uses the same processas a conventional color photograph, but the three light-sensitive layers are developed by chemical layers built into the film. The processis activated by a chemical squeezed from the reagent pod onto the film as it leaves the camera.