The film as the storage option for images was invented at the beginning of the 19th century. The researchers at that time were experimenting with toxic chemicals to store light reflected from the objects on a long-term basis. The Frenchman, Louis Daguerre, finally succeeded in 1837 to fix the images on a light-sensitive material in a salt bath. This was the first film. However, the exposure times were very long. People had to sit for a long time while the photographer captured their image on a photographic plate. The path to the film roll was paved in 1889 by the American George Eastman – a thin layer of silver salts was applied on flexible plastic celluloid. Digital cameras do not need this because they store everything on a computer chip.
