How photographs were developed in olden days?
Photo Credit: Courtesy of 3DStockPhoto (in image)
The first photographic process — heliography — was invented around 1824 by Nicéphore Niépce. Images were obtained with bitumen of Judea spread on a silver plate after an exposure time of several days. In 1829, Niépce associated Louis Jacques Mandé Daguerre to his research.