text: Slide 16 of 31: This family scene from Manchuria, northeastern China, in the early 1900s was colourized and immortalized on a magic lantern slide. As far back as the 17th century, according to the Magic Lantern Society of the United States and Canada, scenes were painted on glass and shown using these early projectors, which work by shining light through glass slides. In the 1850s, the first methods for printing black-and-white photos on glass were developed, although early colour photo slides had to be coloured by hand directly on the glass. Colour transparency film wasn’t available until the 1930s.