fotogramm
Fotogramm, or photogram, is a photographic image made without a camera by exposing a light-sensitive surface directly to light while objects are laid on or placed near the surface. The objects obscure part of the light, producing silhouettes or tonal variations that reflect the shape, density and translucency of the items. The technique relies on contact printing: the final image is formed in the same size and orientation as the objects placed on the light-sensitive material.
History and notable practitioners
Photograms have roots in early photographic experiments such as photogenic drawing in the 1830s. The term photogram
Traditional photograms use silver gelatin photographic paper or similar light-sensitive surfaces. Objects such as leaves, fabric,
Photograms are valued for their direct, camera-less interface between light and matter. They are used in education