Impossible PRD2441 PX 680 Color Protection Film for 600 Cameras (White) No Shielding! Load the film, shoot the film and be amazed by the film! Accurate ISO. Provides more exposure finesse to caprture that perfect shot. Optimized to produce dramatic color, contrast and clarity. Development time is between 25-30 minutes. Heat affects the final image so do not leave the image processing in direct sunlight or on a heated surface. For best results, store unopened film in the refrigerator until use.