Impossible Image Spectra BW Film Pack 8 Shots Description. This pack of Instant Black White Film for Polaroid Image Spectra Cameras from The Impossible Project contains 8 sheets of instant black & white film. Each sheet of film has a 3. 5 x 2. 9 glossy surface image area. Full development will occur Approx. 10 minutes after exposure when working in a temperature of around 70F 21C.