Grainless Films

In Berlin, last fortnight, Professor Emanuel Goldberg, German photographic chemist, announced that he had found a grainless emulsion for films which makes it possible to take a photograph the size of a pinpoint (.01 sq. millimeter) and greatly enlarge it with perfect reproduction of detail.

Pictures produced with ordinary silver emulsion film cannot be too small or too large without suffering distortion. The images recorded on light-sensitive film when the camera's shutter is snapped are formed by small deposits of metallic silver grains. For photographs taken through the microscope, these grains are often too gross, blur the minute detail. Greatly enlarged pictures are pockmarked. Cinema "stills," when projected, look spotted because of their size. Since the films in the ordinary moving picture are shown in rapid succession the grain patterns, which are different in every picture, blend, escape the eyes of the spectators.

By taking pictures through an inverted microscope onto a film coated with the Goldberg emulsion it is claimed that 100 novels could be printed on one postcard and a man could carry his library in his billfold. A spy could carry a photograph of a campaign map on a piece of paper no bigger than a beauty spot.

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