108. Joly's process, 1896
The first technique to circumvent the need for the three primary colours to be recorded as separate images was invented by the Irish scientist John Joly. The photograph is taken through a screen of vertical lines in the three colours, and the positive then viewed through the screen. Joly's process foreshadowed those of a decade later, but was not itself a commercial success.
Glass screened positive 81 x 81 mm and separate viewing screen.