Niepce partnered with Louis Daguerre in 1829 and attempted to imporved the photoprocessing method. (Niepce died shortly thereafter). After many years of experimenting, Daguerre finally found a more effective way. The process involved fixing images onto silver plated copper. The silver was polished and coated in iodine (making it light sensitive) and was then placed in a camera and exposed for a few minutes. Finally it was bathed in silver chloride, creating a long lasting image.