About this item SERIOUSLY WEIRD: Theorized by Polaroid founder Edwin Land in the 1970s, Retinex Theory shows how colors are interpreted differently depending on surrounding colors. Wait, what? RETINEX FILM: Capture the world in a new, vibrant light with 10 unique circular frame designs. This color conundrum makes your eyes and brain begin to groove in some seriously strange ways. Your journey into uncharted realms of color creativity begins here. HISTORIC LIMITED EDITION: A true celebration of Polaroid's legacy and heritage, these limited special edition Retinex frames let you collect a piece of Polaroid's history. DOUBLE PACK FILM: Polaroid Round Frame Retinex Edition Instant Color Film for I-Type cameras contains two packs of 8 count film for a total of 16 photos. I-Type film is only compatible with Polaroid I-Type cameras and printers. DEVELOP: All photos appear blank at first. Photos develop within 15 minutes. Shield photos from the light and place them face down as they develop.