How George Eastman Revolutionized Photography — mentalfloss.com

In 1885, George Eastman introduced "film" in a form we would recognize today—a roll of photographic emulsion that could be run through a camera. (It did use paper as its backing, which was problematic, but still, roughly the same idea we continued to use for more than a hundred years.) Prior to Eastman's invention, the typical method for making a photograph involved using a plate negative, which was fragile, expensive, and involved a lot of chemistry by the photographer. So he fixed it.

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