High Quality Content by WIKIPEDIA articles! Like all photographic processes, photograms require light. The most commonly used source of light for this purpose is the enlarger used in conventional negative printing, but any light source can be used. The figure on the right shows how the image is formed. In the traditional darkroom setting, the paper is held in place using a printing frame. The objects to be used in making the image are placed on top of the paper. When a suitable composition has been found, the enlarger is used to expose the paper . Finally, the paper is processed, as normal, in print-developing chemicals, and washed and dried.

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