Cameraless Photography.
Cameraless Photography can be lots of different things like Photograms/Rayographs, Cyanotypes and Chemigrams. Photograms/Rayographs are cameraless images created by using photographic paper and exposing them to light leaving impressions on the page where objects where placed on it, if light is protecting it will leave a white or grey impression however if the light isn't protecting an area it will turn black. if the light is able to get underneath the image it will change in tone. Photograms are experiment made in the darkroom where developer, stop and fix are used to prompt the image to show they are finally washed in water. Chemigrams its also a form of cameraless photography using light sensitive or photographic paper it could have already been exposed to light and usually it would begin to turn black but when its developed and a chemical is added, it will block out the other chemical effects of the developer and fix and parts covered will change colour due to the exposure to light.