'Your own vegetables all the year round...if you Dig for Victory Now'. Dufaycolor colour transparency copy of a British Second World War propaganda poster. The government introduced a 'Dig for Victory' campaign that called for every man and woman in Britain to keep an allotment. Lawns and flower-beds were turned into vegetable gardens. The Dufaycolor process was introduced as cine film in 1932 and as rollfilm for still photography in 1935. Based on Frenchman Louis Dufay's (1874-1936) Dioptichrome process of 1908, it was the last 'additive' colour process to be marketed and consisted of a very fine, regular filter screen made up of red, green and blue lines printed on a film base. Dufaycolor was popular with both amateur and professional photographers and survived until the 1950s.
© Kodak Collection / National Science & Media Museum / Science & Society Picture Library