Photograms are images made in darkroom, by projecting light (usually under enlarger so time may be precisely controled) directly onto photosensitive paper. Various objects, or substances, are placed between light and paper so as to make shapes or bend the light to form unique images. Can be most amazing and surprising! I also use paper negatives, film negatives, and x-rays…….
what-is-a-photogram Power-point presentation