1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:How does salt dissolve in water?Where do dyes come from?What is the difference between a m...What is a molecule?How big is an atom?*How does film processing work?*How do detergents work?How many elements are there?Which is the most common element?What is inside a fire extinguisher?What is a polymer?What are acids used for?Are tyres made from natural rubber? How does film processing work? Camera film is a plastic sheet coated with grains of silver salts that are sensitive to light. When film is exposed in a camera, the silver grains are affected by light. During processing, a developer converts the grains back to silver, forming a negative image. The negative is made into a positive print by projecting it onto a sheet of paper coated with similar silver salts. After development, light areas on the negative become dark areas on the print and dark areas become light. Film is developed to produce a negative, which is enlarged to make a print.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Chemistry