Debbie Schmidt, age 14, of Hamilton, Ohio, for her question:

WHO INVENTED TECHNICOLOR?

Technicolor is a patented process for making colored motion pictures that was invented by a chemical engineer named Herbert Kalmus in about 1917. The process originally involved making three separate negatives of a scene to get a picture that appears to have the colors of a natural object.

At first, technicians separated the colors by a method known as color subtraction. Then the negatives were printed on film. A dye process was used to reproduce the colors of nature.

The first Technicolor full length all color film was made in 1923. It was called "Toll of the Sea."

Technicolor cooperated with the Eastman Kodak Company to produce a simplified color process in the 1930s. The new process did not require three separate negatives. It uses a single reversal process film that has three light sensitive emulsion layers and a yellow filter film below the upper emulsion.