The first versatile photographic roll film was marketed by George Eastman, founding father of Kodak in 1885, but this original “film” was actually a coating on a paper base. As a part of the processing, the image-bearing layer was stripped from the paper and transferred to a hardened gelatin support. The first clear plastic roll film adopted in 1889. It was produced from highly flammable nitrocellulose generally recognized as nitrate movie. Undeveloped Arista black-and-white movie, ISO 125/22°Hurter and Driffield started pioneering work on the sunshine sensitivity of photographic emulsions in 1876. Their work enabled the primary quantitative measure of film velocity to be devised.
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