Polaroid SX-70 manipulation an old film technique using a polaroid Sx-70 camera and time zero film. Once the true picture is taken you then you process the film on the spot following the exposure, and then the manipulation of the image is done at the same point in time. SX-70 film, now called time zero film, came out in 1972 with the polaroid Sx-70 land camera. The emulsion did not harden as quickly as it was supposed to, allowing artists using various tools to push and smear the dye and base layers around to create impressionistic-looking, or "painterly" images. Some people continue the process through digital manipulation or painting/drawing over the Mylar cover with oils, acrylics, or inks, or otherwise embellishing the image. Examples: Sources: https://blueplanetphoto.com/blog/2005/12/28/the-passing-of-an-artform-sx-70-manipulation/#.XGMxBM9Kii4