The Polaroid process revolutionised photography in the 1960s. Those who have used Polaroid cameras often recall the distinctive smell of the developing emulsion and the magic of watching an image materialise instantly. Depending on the camera model, some prints developed automatically, while others required the application of a chemical coating to fix the image. In this sense, Polaroids can be seen as a precursor to today’s digital photography – not in technical terms, but because...