material such as photographic paper and then exposing it to light. The usual result is a negative shadow image that shows variations in tone that depends upon A photogram is a photographic image made without a camera by placing objects directly onto the surface of a light-sensitive material such as photographic paper and then exposing it to light. The usual result is a negative shadow image that shows variations in tone that depends upon the transparency of the objects used. Areas of the paper that have received no light appear white; those exposed for Luminogram – photogram using light only with no objects Schlieren photography – light is focused with a lens or mirror and a knife edge is placed at the focal point to create graduated shadows of flow and waves in otherwise transparent media like air, water, or glass Shadowgraph – like Schlieren photography, but without the knife-edge, reveals non-uniformities in transparent media Chemigram – camera-less technique using photographic (and other) chemistry with light Neues…